@article{FuehnerGranacherGolleetal.2022,
  author    = {F{\"u}hner, Thea Heidi and Granacher, Urs and Golle, Kathleen and Kliegl, Reinhold},
  title     = {Effect of timing of school enrollment on physical fitness in third graders},
  series = {Scientific Reports},
  volume    = {12},
  journal   = {Scientific Reports},
  publisher = {Springer Nature},
  address   = {London},
  issn      = {2045-2322},
  doi       = {10.1038/s41598-022-11710-x},
  pages     = {1 -- 11},
  year      = {2022},
  abstract  = {Timing of initial school enrollment may vary considerably for various reasons such as early or delayed enrollment, skipped or repeated school classes. Accordingly, the age range within school grades includes older-(OTK) and younger-than-keyage (YTK) children. Hardly any information is available on the impact of timing of school enrollment on physical fitness. There is evidence from a related research topic showing large differences in academic performance between OTK and YTK children versus keyage children. Thus, the aim of this study was to compare physical fitness of OTK (N = 26,540) and YTK (N = 2586) children versus keyage children (N = 108,295) in a representative sample of German third graders. Physical fitness tests comprised cardiorespiratory endurance, coordination, speed, lower, and upper limbs muscle power. Predictions of physical fitness performance for YTK and OTK children were estimated using data from keyage children by taking age, sex, school, and assessment year into account. Data were annually recorded between 2011 and 2019. The difference between observed and predicted z-scores yielded a delta z-score that was used as a dependent variable in the linear mixed models. Findings indicate that OTK children showed poorer performance compared to keyage children, especially in coordination, and that YTK children outperformed keyage children, especially in coordination. Teachers should be aware that OTK children show poorer physical fitness performance compared to keyage children.},
  language  = {en}
}
@article{SchadVasishthHohensteinetal.2020,
  author    = {Schad, Daniel and Vasishth, Shravan and Hohenstein, Sven and Kliegl, Reinhold},
  title     = {How to capitalize on a priori contrasts in linear (mixed) models},
  series = {Journal of memory and language},
  volume    = {110},
  journal   = {Journal of memory and language},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {0749-596X},
  doi       = {10.1016/j.jml.2019.104038},
  pages     = {40},
  year      = {2020},
  abstract  = {Factorial experiments in research on memory, language, and in other areas are often analyzed using analysis of variance (ANOVA). However, for effects with more than one numerator degrees of freedom, e.g., for experimental factors with more than two levels, the ANOVA omnibus F-test is not informative about the source of a main effect or interaction. Because researchers typically have specific hypotheses about which condition means differ from each other, a priori contrasts (i.e., comparisons planned before the sample means are known) between specific conditions or combinations of conditions are the appropriate way to represent such hypotheses in the statistical model. Many researchers have pointed out that contrasts should be "tested instead of, rather than as a supplement to, the ordinary 'omnibus' F test" (Hays, 1973, p. 601). In this tutorial, we explain the mathematics underlying different kinds of contrasts (i.e., treatment, sum, repeated, polynomial, custom, nested, interaction contrasts), discuss their properties, and demonstrate how they are applied in the R System for Statistical Computing (R Core Team, 2018). In this context, we explain the generalized inverse which is needed to compute the coefficients for contrasts that test hypotheses that are not covered by the default set of contrasts. A detailed understanding of contrast coding is crucial for successful and correct specification in linear models (including linear mixed models). Contrasts defined a priori yield far more useful confirmatory tests of experimental hypotheses than standard omnibus F-tests. Reproducible code is available from https://osf.io/7ukf6/.},
  language  = {en}
}
@article{FuehnerGranacherGolleetal.2021,
  author    = {F{\"u}hner, Thea Heidi and Granacher, Urs and Golle, Kathleen and Kliegl, Reinhold},
  title     = {Age and sex effects in physical fitness components of 108,295 third graders including 515 primary schools and 9 cohorts},
  series = {Scientific Reports},
  volume    = {11},
  journal   = {Scientific Reports},
  publisher = {Nature Portfolio},
  address   = {Berlin},
  issn      = {2045-2322},
  doi       = {10.1038/s41598-021-97000-4},
  pages     = {1 -- 13},
  year      = {2021},
  abstract  = {Children's physical fitness development and related moderating effects of age and sex are well documented, especially boys' and girls' divergence during puberty. The situation might be different during prepuberty. As girls mature approximately two years earlier than boys, we tested a possible convergence of performance with five tests representing four components of physical fitness in a large sample of 108,295 eight-year old third-graders. Within this single prepubertal year of life and irrespective of the test, performance increased linearly with chronological age, and boys outperformed girls to a larger extent in tests requiring muscle mass for successful performance. Tests differed in the magnitude of age effects (gains), but there was no evidence for an interaction between age and sex. Moreover, "physical fitness" of schools correlated at r = 0.48 with their age effect which might imply that "fit schools" promote larger gains; expected secular trends from 2011 to 2019 were replicated.},
  language  = {en}
}
@article{LiWangMoetal.2018,
  author    = {Li, Nan and Wang, Suiping and Mo, Luxi and Kliegl, Reinhold},
  title     = {Contextual constraint and preview time modulate the semantic preview effect},
  series = {The quarterly journal of experimental psychology},
  volume    = {71},
  journal   = {The quarterly journal of experimental psychology},
  number    = {1},
  publisher = {Sage Publ.},
  address   = {London},
  issn      = {1747-0218},
  doi       = {10.1080/17470218.2017.1310914},
  pages     = {241 -- 249},
  year      = {2018},
  abstract  = {Word recognition in sentence reading is influenced by information from both preview and context. Recently, semantic preview effect (SPE) was observed being modulated by the constraint of context, indicating that context might accelerate the processing of semantically related preview words. Besides, SPE was found to depend on preview time, which suggests that SPE may change with different processing stages of preview words. Therefore, it raises the question of whether preview time-dependent SPE would be modulated by contextual constraint. In this study, we not only investigated the impact of contextual constraint on SPE in Chinese reading but also examined its dependency on preview time. The preview word and the target word were identical, semantically related or unrelated to the target word. The results showed a significant three-way interaction: The SPE depended on contextual constraint and preview time. In separate analyses for low and high contextual constraint of target words, the SPE significantly decreased with an increase in preview duration when the target word was of low constraint in the sentence. The effect was numerically in the same direction but weaker and statistically nonsignificant when the target word was highly constrained in the sentence. The results indicate that word processing in sentences is a dynamic process of integrating information from both preview (bottom-up) and context (top-down).},
  language  = {en}
}
@article{ZhouWangShuetal.2018,
  author    = {Zhou, Wei and Wang, Aiping and Shu, Hua and Kliegl, Reinhold and Yan, Ming},
  title     = {Word segmentation by alternating colors facilitates eye guidance in Chinese reading},
  series = {Memory \& cognition},
  volume    = {46},
  journal   = {Memory \& cognition},
  number    = {5},
  publisher = {Springer},
  address   = {New York},
  issn      = {0090-502X},
  doi       = {10.3758/s13421-018-0797-5},
  pages     = {729 -- 740},
  year      = {2018},
  abstract  = {During sentence reading, low spatial frequency information afforded by spaces between words is the primary factor for eye guidance in spaced writing systems, whereas saccade generation for unspaced writing systems is less clear and under debate. In the present study, we investigated whether word-boundary information, provided by alternating colors (consistent or inconsistent with word-boundary information) influences saccade-target selection in Chinese. In Experiment 1, as compared to a baseline (i.e., uniform color) condition, word segmentation with alternating color shifted fixation location towards the center of words. In contrast, incorrect word segmentation shifted fixation location towards the beginning of words. In Experiment 2, we used a gaze-contingent paradigm to restrict the color manipulation only to the upcoming parafoveal words and replicated the results, including fixation location effects, as observed in Experiment 1. These results indicate that Chinese readers are capable of making use of parafoveal word-boundary knowledge for saccade generation, even if such information is unfamiliar to them. The present study provides novel support for the hypothesis that word segmentation is involved in the decision about where to fixate next during Chinese reading.},
  language  = {en}
}
@article{MatuschekKliegl2017,
  author    = {Matuschek, Hannes and Kliegl, Reinhold},
  title     = {On the ambiguity of interaction and nonlinear main effects in a regime of dependent covariates},
  series = {Behavior research methods : a journal of the Psychonomic Society},
  volume    = {50},
  journal   = {Behavior research methods : a journal of the Psychonomic Society},
  number    = {5},
  publisher = {Springer},
  address   = {New York},
  issn      = {1554-351X},
  doi       = {10.3758/s13428-017-0956-9},
  pages     = {1882 -- 1894},
  year      = {2017},
  abstract  = {The analysis of large experimental datasets frequently reveals significant interactions that are difficult to interpret within the theoretical framework guiding the research. Some of these interactions actually arise from the presence of unspecified nonlinear main effects and statistically dependent covariates in the statistical model. Importantly, such nonlinear main effects may be compatible (or, at least, not incompatible) with the current theoretical framework. In the present literature, this issue has only been studied in terms of correlated (linearly dependent) covariates. Here we generalize to nonlinear main effects (i.e., main effects of arbitrary shape) and dependent covariates. We propose a novel nonparametric method to test for ambiguous interactions where present parametric methods fail. We illustrate the method with a set of simulations and with reanalyses (a) of effects of parental education on their children's educational expectations and (b) of effects of word properties on fixation locations during reading of natural sentences, specifically of effects of length and morphological complexity of the word to be fixated next. The resolution of such ambiguities facilitates theoretical progress.},
  language  = {en}
}
@article{HortobagyiUematsuSandersetal.2018,
  author    = {Hortobagyi, Tibor and Uematsu, Azusa and Sanders, Lianne and Kliegl, Reinhold and Tollar, Jozsef and Moraes, Renato and Granacher, Urs},
  title     = {Beam Walking to Assess Dynamic Balance in Health and Disease},
  series = {Gerontology},
  volume    = {65},
  journal   = {Gerontology},
  number    = {4},
  publisher = {Karger},
  address   = {Basel},
  issn      = {0304-324X},
  doi       = {10.1159/000493360},
  pages     = {332 -- 339},
  year      = {2018},
  abstract  = {Background: Dynamic balance keeps the vertical projection of the center of mass within the base of support while walking. Dynamic balance tests are used to predict the risks of falls and eventual falls. The psychometric properties of most dynamic balance tests are unsatisfactory and do not comprise an actual loss of balance while walking. Objectives: Using beam walking distance as a measure of dynamic balance, the BEAM consortium will determine the psychometric properties, lifespan and patient reference values, the relationship with selected "dynamic balance tests," and the accuracy of beam walking distance to predict falls. Methods: This cross-sectional observational study will examine healthy adults in 7 decades (n = 432) at 4 centers. Center 5 will examine patients (n = 100) diagnosed with Parkinson's disease, multiple sclerosis, stroke, and balance disorders. In test 1, all participants will be measured for demographics, medical history, muscle strength, gait, static balance, dynamic balance using beam walking under single (beam walking only) and dual task conditions (beam walking while concurrently performing an arithmetic task), and several cognitive functions. Patients and healthy participants age 50 years or older will be additionally measured for fear of falling, history of falls, miniBESTest, functional reach on a force platform, timed up and go, and reactive balance. All participants age 50 years or older will be recalled to report fear of falling and fall history 6 and 12 months after test 1. In test 2, seven to ten days after test 1, healthy young adults and age 50 years or older (n = 40) will be retested for reliability of beam walking performance. Conclusion: We expect to find that beam walking performance vis-{\`a}-vis the traditionally used balance outcomes predicts more accurately fall risks and falls. Clinical Trial Registration Number: NCT03532984.},
  language  = {en}
}
@article{TetznerKlieglKraheetal.2017,
  author    = {Tetzner, Julia and Kliegl, Reinhold and Krah{\´e}, Barbara and Busching, Robert and Esser, G{\"u}nter},
  title     = {Developmental problems in adolescence},
  series = {Journal of Applied Developmental Psychology},
  volume    = {53},
  journal   = {Journal of Applied Developmental Psychology},
  publisher = {Elsevier},
  address   = {New York},
  issn      = {0193-3973},
  doi       = {10.1016/j.appdev.2017.08.003},
  pages     = {40 -- 53},
  year      = {2017},
  abstract  = {This longitudinal study investigated patterns of developmental problems across depression, aggression, and academic achievement during adolescence, using two measurement points two years apart (N = 1665; age T1: M = 13.14; female = 49.6\%). Latent Profile Analyses and Latent Transition Analyses yielded four main findings: A three-type solution provided the best fit to the data: an asymptomatic type (i.e., low problem scores in all three domains), a depressed type (i.e., high scores in depression), an aggressive type (i.e., high scores in aggression). Profile types were invariant over the two data waves but differed between girls and boys, revealing gender specific patterns of comorbidity. Stabilities over time were high for the asymptomatic type and for types that represented problems in one domain, but moderate for comorbid types. Differences in demographic variables (i.e., age, socio-economic status) and individual characteristics (i.e., self-esteem, dysfunctional cognitions, cognitive capabilities) predicted profile type memberships and longitudinal transitions between types.},
  language  = {en}
}
@article{LaurinavichyuteSekerinaAlexeevaetal.2019,
  author    = {Laurinavichyute, Anna and Sekerina, Irina A. and Alexeeva, Svetlana and Bagdasaryan, Kristine and Kliegl, Reinhold},
  title     = {Russian Sentence Corpus: Benchmark measures of eye movements in reading in Russian},
  series = {Behavior research methods : a journal of the Psychonomic Society},
  volume    = {51},
  journal   = {Behavior research methods : a journal of the Psychonomic Society},
  number    = {3},
  publisher = {Springer},
  address   = {New York},
  issn      = {1554-351X},
  doi       = {10.3758/s13428-018-1051-6},
  pages     = {1161 -- 1178},
  year      = {2019},
  abstract  = {This article introduces a new corpus of eye movements in silent readingthe Russian Sentence Corpus (RSC). Russian uses the Cyrillic script, which has not yet been investigated in cross-linguistic eye movement research. As in every language studied so far, we confirmed the expected effects of low-level parameters, such as word length, frequency, and predictability, on the eye movements of skilled Russian readers. These findings allow us to add Slavic languages using Cyrillic script (exemplified by Russian) to the growing number of languages with different orthographies, ranging from the Roman-based European languages to logographic Asian ones, whose basic eye movement benchmarks conform to the universal comparative science of reading (Share, 2008). We additionally report basic descriptive corpus statistics and three exploratory investigations of the effects of Russian morphology on the basic eye movement measures, which illustrate the kinds of questions that researchers can answer using the RSC. The annotated corpus is freely available from its project page at the Open Science Framework: https://osf.io/x5q2r/.},
  language  = {en}
}
@article{YanPanChangetal.2019,
  author    = {Yan, Ming and Pan, Jinger and Chang, Wenshuo and Kliegl, Reinhold},
  title     = {Read sideways or not: vertical saccade advantage in sentence reading},
  series = {Reading and writing : an interdisciplinary journal},
  volume    = {32},
  journal   = {Reading and writing : an interdisciplinary journal},
  number    = {8},
  publisher = {Springer},
  address   = {Dordrecht},
  issn      = {0922-4777},
  doi       = {10.1007/s11145-018-9930-x},
  pages     = {1911 -- 1926},
  year      = {2019},
  abstract  = {During the reading of alphabetic scripts and scene perception, eye movements are programmed more efficiently in horizontal direction than in vertical direction. We propose that such a directional advantage may be due the overwhelming reading experience in the horizontal direction. Writing orientation is highly flexible for Traditional Chinese sentences. We compare horizontal and vertical eye movements during reading of such sentences and provide first evidence of a text-orientation effect on eye-movement control during reading. In addition to equivalent reading speed in both directions, more fine-grained analyses demonstrate a tradeoff between longer fixation durations and better fixation locations in vertical than in horizontal reading. Our results suggest that with extensive reading experience, Traditional Chinese readers can generate saccades more efficiently in vertical than in horizontal direction.},
  language  = {en}
}
@article{YanPanKliegl2019,
  author    = {Yan, Ming and Pan, Jinger and Kliegl, Reinhold},
  title     = {Eye Movement Control in Chinese Reading: A Cross-Sectional Study},
  series = {Developmental psychology},
  volume    = {55},
  journal   = {Developmental psychology},
  number    = {11},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0012-1649},
  doi       = {10.1037/dev0000819},
  pages     = {2275 -- 2285},
  year      = {2019},
  abstract  = {The present study explored the age-related changes of eye movement control in reading-that is, where to send the eyes and when to move them. Different orthographies present readers with somewhat different problems to solve, and this might, in turn, be reflected in different patterns of development of reading skill. Participants of different developmental levels (Grade 3, N = 30; Grade 5, N = 27 and adults, N = 27) were instructed to read sentences for comprehension while their eye movements were recorded. Contrary to previous findings that have been well documented indicating early maturation of saccade generation in English, current results showed that saccade generation among Chinese readers was still under development at Grade 5, although immediate lexical processing was relatively well-established. The distinct age-related changes in eye movements are attributable to certain linguistic properties of Chinese including the lack of interword spaces and word boundary uncertainty. The present study offers an example of how human eye movement adapts to the orthographic environment.},
  language  = {en}
}
@article{YanWangSongetal.2019,
  author    = {Yan, Ming and Wang, Aiping and Song, Hosu and Kliegl, Reinhold},
  title     = {Parafoveal processing of phonology and semantics during the reading of Korean sentences},
  series = {Cognition : international journal of cognitive science},
  volume    = {193},
  journal   = {Cognition : international journal of cognitive science},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0010-0277},
  doi       = {10.1016/j.cognition.2019.104009},
  pages     = {7},
  year      = {2019},
  abstract  = {The present study sets out to address two fundamental questions in the reading of continuous texts: Whether semantic and phonological information from upcoming words can be accessed during natural reading. In the present study we investigated parafoveal processing during the reading of Korean sentences, manipulating semantic and phonological information from parafoveal preview words. In addition to the first evidence for a semantic preview effect in Korean, we found that Korean readers have stronger and more long-lasting phonological than semantic activation from parafoveal words in second-pass reading. The present study provides an example that human mind can flexibly adjust processing priority to different types of information based on the linguistic environment.},
  language  = {en}
}
@article{MassonRabeKliegl2017,
  author    = {Masson, Michael E. J. and Rabe, Maximilian M. and Kliegl, Reinhold},
  title     = {Modulation of additive and interactive effects by trial history revisited},
  series = {Memory \& cognition},
  volume    = {45},
  journal   = {Memory \& cognition},
  publisher = {Springer},
  address   = {New York},
  issn      = {0090-502X},
  doi       = {10.3758/s13421-016-0666-z},
  pages     = {480 -- 492},
  year      = {2017},
  language  = {en}
}
@article{MatuschekKlieglVasishthetal.2017,
  author    = {Matuschek, Hannes and Kliegl, Reinhold and Vasishth, Shravan and Baayen, Harald R. and Bates, Douglas},
  title     = {Balancing Type I error and power in linear mixed models},
  series = {Journal of memory and language},
  volume    = {94},
  journal   = {Journal of memory and language},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {0749-596X},
  doi       = {10.1016/j.jml.2017.01.001},
  pages     = {305 -- 315},
  year      = {2017},
  abstract  = {Linear mixed-effects models have increasingly replaced mixed-model analyses of variance for statistical inference in factorial psycholinguistic experiments. Although LMMs have many advantages over ANOVA, like ANOVAs, setting them up for data analysis also requires some care. One simple option, when numerically possible, is to fit the full variance covariance structure of random effects (the maximal model; Barr, Levy, Scheepers \& Tily, 2013), presumably to keep Type I error down to the nominal a in the presence of random effects. Although it is true that fitting a model with only random intercepts may lead to higher Type I error, fitting a maximal model also has a cost: it can lead to a significant loss of power. We demonstrate this with simulations and suggest that for typical psychological and psycholinguistic data, higher power is achieved without inflating Type I error rate if a model selection criterion is used to select a random effect structure that is supported by the data. (C) 2017 The Authors. Published by Elsevier Inc.},
  language  = {en}
}
@article{BaayenVasishthKliegletal.2017,
  author    = {Baayen, Harald R. and Vasishth, Shravan and Kliegl, Reinhold and Bates, Douglas},
  title     = {The cave of shadows: Addressing the human factor with generalized additive mixed models},
  series = {Journal of memory and language},
  volume    = {94},
  journal   = {Journal of memory and language},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {0749-596X},
  doi       = {10.1016/j.jml.2016.11.006},
  pages     = {206 -- 234},
  year      = {2017},
  language  = {en}
}
@article{BeurskensHaegerKliegletal.2016,
  author    = {Beurskens, Rainer and Haeger, Matthias and Kliegl, Reinhold and Roecker, Kai and Granacher, Urs},
  title     = {Postural Control in Dual-Task Situations: Does Whole-Body Fatigue Matter?},
  series = {PLoS one},
  volume    = {11},
  journal   = {PLoS one},
  publisher = {PLoS},
  address   = {San Fransisco},
  issn      = {1932-6203},
  doi       = {10.1371/journal.pone.0147392},
  pages     = {1379 -- 1384},
  year      = {2016},
  abstract  = {Postural control is important to cope with demands of everyday life. It has been shown that both attentional demand (i.e., cognitive processing) and fatigue affect postural control in young adults. However, their combined effect is still unresolved. Therefore, we investigated the effects of fatigue on single-(ST) and dual-task (DT) postural control. Twenty young subjects (age: 23.7 +/- 2.7) performed an all-out incremental treadmill protocol. After each completed stage, one-legged-stance performance on a force platform under ST (i.e., one-legged-stance only) and DT conditions (i.e., one-legged-stance while subtracting serial 3s) was registered. On a second test day, subjects conducted the same balance tasks for the control condition (i.e., non-fatigued). Results showed that heart rate, lactate, and ventilation increased following fatigue (all p < 0.001; d = 4.2-21). Postural sway and sway velocity increased during DT compared to ST (all p < 0.001; d = 1.9-2.0) and fatigued compared to non-fatigued condition (all p < 0.001; d = 3.3-4.2). In addition, postural control deteriorated with each completed stage during the treadmill protocol (all p < 0.01; d = 1.9-3.3). The addition of an attention-demanding interference task did not further impede one-legged-stance performance. Although both additional attentional demand and physical fatigue affected postural control in healthy young adults, there was no evidence for an overadditive effect (i.e., fatigue-related performance decrements in postural control were similar under ST and DT conditions). Thus, attentional resources were sufficient to cope with the DT situations in the fatigue condition of this experiment.},
  language  = {en}
}
@article{OhlWohltatKliegletal.2016,
  author    = {Ohl, Sven and Wohltat, Christian and Kliegl, Reinhold and Pollatos, Olga and Engbert, Ralf},
  title     = {Microsaccades Are Coupled to Heartbeat},
  series = {The journal of neuroscience},
  volume    = {36},
  journal   = {The journal of neuroscience},
  publisher = {Society for Neuroscience},
  address   = {Washington},
  issn      = {0270-6474},
  doi       = {10.1523/JNEUROSCI.2211-15.2016},
  pages     = {1237 -- 1241},
  year      = {2016},
  abstract  = {During visual fixation, the eye generates microsaccades and slower components of fixational eye movements that are part of the visual processing strategy in humans. Here, we show that ongoing heartbeat is coupled to temporal rate variations in the generation of microsaccades. Using coregistration of eye recording and ECG in humans, we tested the hypothesis that microsaccade onsets are coupled to the relative phase of the R-R intervals in heartbeats. We observed significantly more microsaccades during the early phase after the R peak in the ECG. This form of coupling between heartbeat and eye movements was substantiated by the additional finding of a coupling between heart phase and motion activity in slow fixational eye movements; i.e., retinal image slip caused by physiological drift. Our findings therefore demonstrate a coupling of the oculomotor system and ongoing heartbeat, which provides further evidence for bodily influences on visuomotor functioning.},
  language  = {en}
}
@article{GoetheOberauerKliegl2016,
  author    = {G{\"o}the, Katrin and Oberauer, Klaus and Kliegl, Reinhold},
  title     = {Eliminating dual-task costs by minimizing crosstalk between tasks: The role of modality and feature pairings},
  series = {Cognition : international journal of cognitive science},
  volume    = {150},
  journal   = {Cognition : international journal of cognitive science},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0010-0277},
  doi       = {10.1016/j.cognition.2016.02.003},
  pages     = {92 -- 108},
  year      = {2016},
  abstract  = {We tested the independent influences of two content-based factors on dual-task costs, and on the parallel processing ability: The pairing of S-R modalities and the pairing of relevant features between stimuli and responses of two tasks. The two pairing factors were realized across four dual-task groups. Within each group the two tasks comprised two different stimulus modalities (visual and auditory), two different relevant stimulus features (spatial and verbal) and two response modalities (manual and vocal). Pairings of S-R modalities (standard: visual-manual and auditory-vocal, non-standard: visual-vocal and auditory manual) and feature pairings (standard: spatial-manual and verbal-vocal, non-standard: spatial-vocal and verbal-manual) varied across groups. All participants practiced their respective dual-task combination in a paradigm with simultaneous stimulus onset before being transferred to a psychological refractory period paradigm varying stimulus-onset asynchrony. A comparison at the end of practice revealed similar dual-task costs and similar pairing effects in both paradigms. Dual-task costs depended on modality and feature pairings. Groups training with non-standard feature pairings (i.e., verbal stimulus features mapped to spatially separated response keys, or spatial stimulus features mapped to verbal responses) and non-standard modality pairings (i.e., auditory stimulus mapped to manual response, or visual stimulus mapped to vocal responses) had higher dual-task costs than respective standard pairings. In contrast, irrespective of modality pairing dual-task costs virtually disappeared with standard feature pairings after practice in both paradigms. The results can be explained by crosstalk between feature-binding processes for the two tasks. Crosstalk was present for non-standard but absent for standard feature pairings. Therefore, standard feature pairings enabled parallel processing at the end of practice. (C) 2016 Elsevier B.V. All rights reserved.},
  language  = {en}
}
@article{OhlKliegl2016,
  author    = {Ohl, Sven and Kliegl, Reinhold},
  title     = {Revealing the time course of signals influencing the generation of},
  series = {Vision research : an international journal for functional aspects of vision.},
  volume    = {124},
  journal   = {Vision research : an international journal for functional aspects of vision.},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0042-6989},
  doi       = {10.1016/j.visres.2016.06.007},
  pages     = {52 -- 58},
  year      = {2016},
  abstract  = {Saccadic eye movements are frequently followed by smaller secondary saccades which are generally assumed to correct for the error in primary saccade landing position. However, secondary saccades can also occur after accurate primary saccades and they are often as small as microsaccades, therefore raising the need to further scrutinize the processes involved in secondary saccade generation. Following up a previous study, we analyzed secondary saccades using rate analysis which allows us to quantify experimental effects as shifts in distributions, therefore going beyond comparisons of mean differences. We use Aalen's additive hazards model to delineate the time course of key influences on the secondary saccade rate. In addition to the established effect of primary saccade error, we observed a time-varying influence of under- vs. overshooting - with a higher risk of generating secondary saccades following undershoots. Moreover, increasing target eccentricity influenced the programming of secondary saccades, therefore demonstrating that error-unrelated variables co-determine secondary saccade programs. Our results provide new insights into the generative mechanisms of small saccades during postsaccadic fixation that need to be accounted for by secondary saccade models.},
  language  = {en}
}
@article{NuthmannVituEngbertetal.2016,
  author    = {Nuthmann, Antje and Vitu, Francoise and Engbert, Ralf and Kliegl, Reinhold},
  title     = {No Evidence for a Saccadic Range Effect for Visually Guided and Memory-Guided Saccades in Simple Saccade-Targeting Tasks},
  series = {PLoS one},
  volume    = {11},
  journal   = {PLoS one},
  publisher = {PLoS},
  address   = {San Fransisco},
  issn      = {1932-6203},
  doi       = {10.1371/journal.pone.0162449},
  pages     = {9935 -- 9943},
  year      = {2016},
  abstract  = {Saccades to single targets in peripheral vision are typically characterized by an undershoot bias. Putting this bias to a test, Kapoula [1] used a paradigm in which observers were presented with two different sets of target eccentricities that partially overlapped each other. Her data were suggestive of a saccadic range effect (SRE): There was a tendency for saccades to overshoot close targets and undershoot far targets in a block, suggesting that there was a response bias towards the center of eccentricities in a given block. Our Experiment 1 was a close replication of the original study by Kapoula [1]. In addition, we tested whether the SRE is sensitive to top-down requirements associated with the task, and we also varied the target presentation duration. In Experiments 1 and 2, we expected to replicate the SRE for a visual discrimination task. The simple visual saccade-targeting task in Experiment 3, entailing minimal top-down influence, was expected to elicit a weaker SRE. Voluntary saccades to remembered target locations in Experiment 3 were expected to elicit the strongest SRE. Contrary to these predictions, we did not observe a SRE in any of the tasks. Our findings complement the results reported by Gillen et al. [2] who failed to find the effect in a saccade-targeting task with a very brief target presentation. Together, these results suggest that unlike arm movements, saccadic eye movements are not biased towards making saccades of a constant, optimal amplitude for the task.},
  language  = {en}
}
@article{BeurskensMuehlbauerGrabowetal.2016,
  author    = {Beurskens, Rainer and M{\"u}hlbauer, Thomas and Grabow, Lena and Kliegl, Reinhold and Granacher, Urs},
  title     = {Effects of Backpack Carriage on Dual-Task Performance in Children During Standing and Walking},
  series = {Journal of motor behavior},
  volume    = {48},
  journal   = {Journal of motor behavior},
  publisher = {Wiley-VCH},
  address   = {Abingdon},
  issn      = {0022-2895},
  doi       = {10.1080/00222895.2016.1152137},
  pages     = {500 -- 508},
  year      = {2016},
  language  = {en}
}
@article{YanKliegl2016,
  author    = {Yan, Ming and Kliegl, Reinhold},
  title     = {CarPrice versus CarpRice: Word Boundary Ambiguity Influences Saccade Target Selection During the Reading of Chinese Sentences},
  series = {Journal of experimental psychology : Learning, memory, and cognition},
  volume    = {42},
  journal   = {Journal of experimental psychology : Learning, memory, and cognition},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0278-7393},
  doi       = {10.1037/xlm0000276},
  pages     = {1832 -- 1838},
  year      = {2016},
  abstract  = {As a contribution to a theoretical debate about the degree of high-level influences on saccade targeting during sentence reading, we investigated eye movements during the reading of structurally ambiguous Chinese character strings and examined whether parafoveal word segmentation could influence saccade-target selection. As expected, ambiguous strings took longer to process. More critically there were theoretically relevant interactions between ambiguity and launch site when first-fixation location and saccade amplitude served as dependent variables: Ambiguous strings in the parafovea triggered longer saccades and more rightward fixations for close launch sites than unambiguous ones; the reverse result was obtained for far launch sites. These crossover interactions indicate that parafoveal word segmentation influences saccade generation in Chinese and provide support of the hypothesis that high-level information can be involved in the decision about where to fixate next.},
  language  = {en}
}
@article{YanZhouShuetal.2015,
  author    = {Yan, Ming and Zhou, Wei and Shu, Hua and Kliegl, Reinhold},
  title     = {Perceptual span depends on font size during the reading of chinese sentences},
  series = {Journal of experimental psychology : Learning, memory, and cognition},
  volume    = {41},
  journal   = {Journal of experimental psychology : Learning, memory, and cognition},
  number    = {1},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0278-7393},
  doi       = {10.1037/a0038097},
  pages     = {209 -- 219},
  year      = {2015},
  abstract  = {The present study explored the perceptual span (i.e., the physical extent of an area from which useful visual information is extracted during a single fixation) during the reading of Chinese sentences in 2 experiments. In Experiment 1, we tested whether the rightward span can go beyond 3 characters when visually similar masks were used. Results showed that Chinese readers needed at least 4 characters to the right of fixation to maintain a normal reading behavior when visually similar masks were used and when characters were displayed in small fonts, indicating that the span is dynamically influenced by masking materials. In Experiments 2 and 3, we asked whether the perceptual span varies as a function of font size in spaced (German) and unspaced (Chinese) scripts. Results clearly suggest perceptual span depends on font size in Chinese, but we failed to find such evidence for German. We propose that the perceptual span in Chinese is flexible; it is strongly constrained by its language-specific properties such as high information density and lack of word spacing. Implications for saccade-target selection during the reading of Chinese sentences are discussed.},
  language  = {en}
}
@article{FroemerDimigenNiefindetal.2015,
  author    = {Fr{\"o}mer, Romy and Dimigen, Olaf and Niefind, Florian and Krause, Niels and Kliegl, Reinhold and Sommer, Werner},
  title     = {Are Individual Differences in Reading Speed Related to Extrafoveal Visual Acuity and Crowding?},
  series = {PLoS one},
  volume    = {10},
  journal   = {PLoS one},
  number    = {3},
  publisher = {PLoS},
  address   = {San Fransisco},
  issn      = {1932-6203},
  doi       = {10.1371/journal.pone.0121986},
  pages     = {18},
  year      = {2015},
  abstract  = {Readers differ considerably in their speed of self-paced reading. One factor known to influence fixation durations in reading is the preprocessing of words in parafoveal vision. Here we investigated whether individual differences in reading speed or the amount of information extracted from upcoming words (the preview benefit) can be explained by basic differences in extrafoveal vision-i.e., the ability to recognize peripheral letters with or without the presence of flanking letters. Forty participants were given an adaptive test to determine their eccentricity thresholds for the identification of letters presented either in isolation (extrafoveal acuity) or flanked by other letters (crowded letter recognition). In a separate eye-tracking experiment, the same participants read lists of words from left to right, while the preview of the upcoming words was manipulated with the gaze-contingent moving window technique. Relationships between dependent measures were analyzed on the observational level and with linear mixed models. We obtained highly reliable estimates both for extrafoveal letter identification (acuity and crowding) and measures of reading speed (overall reading speed, size of preview benefit). Reading speed was higher in participants with larger uncrowded windows. However, the strength of this relationship was moderate and it was only observed if other sources of variance in reading speed (e.g., the occurrence of regressive saccades) were eliminated. Moreover, the size of the preview benefit-an important factor in normal reading-was larger in participants with better extrafoveal acuity. Together, these results indicate a significant albeit moderate contribution of extrafoveal vision to individual differences in reading speed.},
  language  = {en}
}
@article{NicenboimVasishthGatteietal.2015,
  author    = {Nicenboim, Bruno and Vasishth, Shravan and Gattei, Carolina and Sigman, Mariano and Kliegl, Reinhold},
  title     = {Working memory differences in long-distance dependency resolution},
  series = {Frontiers in psychology},
  volume    = {6},
  journal   = {Frontiers in psychology},
  publisher = {Frontiers Research Foundation},
  address   = {Lausanne},
  issn      = {1664-1078},
  doi       = {10.3389/fpsyg.2015.00312},
  pages     = {16},
  year      = {2015},
  abstract  = {There is a wealth of evidence showing that increasing the distance between an argument and its head leads to more processing effort, namely, locality effects: these are usually associated with constraints in working memory (DLT: Gibson, 2000: activation-based model: Lewis and Vasishth, 2005). In SOV languages, however, the opposite effect has been found: antilocality (see discussion in Levy et al., 2013). Antilocality effects can be explained by the expectation based approach as proposed by Levy (2008) or by the activation-based model of sentence processing as proposed by Lewis and Vasishth (2005). We report an eye-tracking and a self-paced reading study with sentences in Spanish together with measures of individual differences to examine the distinction between expectation- and memory based accounts, and within memory-based accounts the further distinction between DLT and the activation-based model. The experiments show that (i) antilocality effects as predicted by the expectation account appear only for high-capacity readers; (ii) increasing dependency length by interposing material that modifies the head of the dependency (the verb) produces stronger facilitation than increasing dependency length with material that does not modify the head; this is in agreement with the activation-based model but not with the expectation account; and (iii) a possible outcome of memory load on low-capacity readers is the increase in regressive saccades (locality effects as predicted by memory-based accounts) or, surprisingly, a speedup in the self-paced reading task; the latter consistent with good-enough parsing (Ferreira et al., 2002). In sum, the study suggests that individual differences in working memory capacity play a role in dependency resolution, and that some of the aspects of dependency resolution can be best explained with the activation-based model together with a prediction component.},
  language  = {en}
}
@article{MatuschekKlieglHolschneider2015,
  author    = {Matuschek, Hannes and Kliegl, Reinhold and Holschneider, Matthias},
  title     = {Smoothing Spline ANOVA Decomposition of Arbitrary Splines: An Application to Eye Movements in Reading},
  series = {PLoS one},
  volume    = {10},
  journal   = {PLoS one},
  number    = {3},
  publisher = {PLoS},
  address   = {San Fransisco},
  issn      = {1932-6203},
  doi       = {10.1371/journal.pone.0119165},
  pages     = {15},
  year      = {2015},
  abstract  = {The Smoothing Spline ANOVA (SS-ANOVA) requires a specialized construction of basis and penalty terms in order to incorporate prior knowledge about the data to be fitted. Typically, one resorts to the most general approach using tensor product splines. This implies severe constraints on the correlation structure, i.e. the assumption of isotropy of smoothness can not be incorporated in general. This may increase the variance of the spline fit, especially if only a relatively small set of observations are given. In this article, we propose an alternative method that allows to incorporate prior knowledge without the need to construct specialized bases and penalties, allowing the researcher to choose the spline basis and penalty according to the prior knowledge of the observations rather than choosing them according to the analysis to be done. The two approaches are compared with an artificial example and with analyses of fixation durations during reading.},
  language  = {en}
}
@article{HaendlerKlieglAdani2015,
  author    = {Haendler, Yair and Kliegl, Reinhold and Adani, Flavia},
  title     = {Discourse accessibility constraints in children's processing of object relative clauses},
  series = {Frontiers in psychology},
  volume    = {6},
  journal   = {Frontiers in psychology},
  publisher = {Frontiers Research Foundation},
  address   = {Lausanne},
  issn      = {1664-1078},
  doi       = {10.3389/fpsyg.2015.00360},
  pages     = {17},
  year      = {2015},
  abstract  = {Children's poor performance on object relative clauses has been explained in terms of intervention locality. This approach predicts that object relatives with a full DP head and an embedded pronominal subject are easier than object relatives in which both the head noun and the embedded subject are full DPs. This prediction is shared by other accounts formulated to explain processing mechanisms. We conducted a visual-world study designed to test the off-line comprehension and on-line processing of object relatives in German-speaking 5-year-olds. Children were tested on three types of object relatives, all having a full DP head noun and differing with respect to the type of nominal phrase that appeared in the embedded subject position: another full DP, a 1st- or a 3rd-person pronoun. Grammatical skills and memory capacity were also assessed in order to see whether and how they affect children's performance. Most accurately processed were object relatives with 1st-person pronoun, independently of children's language and memory skills. Performance on object relatives with two full DPs was overall more accurate than on object relatives with 3rd-person pronoun. In the former condition, children with stronger grammatical skills accurately processed the structure and their memory abilities determined how fast they were; in the latter condition, children only processed accurately the structure if they were strong both in their grammatical skills and in their memory capacity. The results are discussed in the light of accounts that predict different pronoun effects like the ones we find, which depend on the referential properties of the pronouns. We then discuss which role language and memory abilities might have in processing object relatives with various embedded nominal phrases.},
  language  = {en}
}
@article{vonderMalsburgKlieglVasishth2015,
  author    = {von der Malsburg, Titus Raban and Kliegl, Reinhold and Vasishth, Shravan},
  title     = {Determinants of Scanpath Regularity in Reading},
  series = {Cognitive science : a multidisciplinary journal of anthropology, artificial intelligence, education, linguistics, neuroscience, philosophy, psychology ; journal of the Cognitive Science Society},
  volume    = {39},
  journal   = {Cognitive science : a multidisciplinary journal of anthropology, artificial intelligence, education, linguistics, neuroscience, philosophy, psychology ; journal of the Cognitive Science Society},
  number    = {7},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {0364-0213},
  doi       = {10.1111/cogs.12208},
  pages     = {1675 -- 1703},
  year      = {2015},
  abstract  = {Scanpaths have played an important role in classic research on reading behavior. Nevertheless, they have largely been neglected in later research perhaps due to a lack of suitable analytical tools. Recently, von der Malsburg and Vasishth (2011) proposed a new measure for quantifying differences between scanpaths and demonstrated that this measure can recover effects that were missed with the traditional eyetracking measures. However, the sentences used in that study were difficult to process and scanpath effects accordingly strong. The purpose of the present study was to test the validity, sensitivity, and scope of applicability of the scanpath measure, using simple sentences that are typically read from left to right. We derived predictions for the regularity of scanpaths from the literature on oculomotor control, sentence processing, and cognitive aging and tested these predictions using the scanpath measure and a large database of eye movements. All predictions were confirmed: Sentences with short words and syntactically more difficult sentences elicited more irregular scanpaths. Also, older readers produced more irregular scanpaths than younger readers. In addition, we found an effect that was not reported earlier: Syntax had a smaller influence on the eye movements of older readers than on those of young readers. We discuss this interaction of syntactic parsing cost with age in terms of shifts in processing strategies and a decline of executive control as readers age. Overall, our results demonstrate the validity and sensitivity of the scanpath measure and thus establish it as a productive and versatile tool for reading research.},
  language  = {en}
}
@article{LaubrockKliegl2015,
  author    = {Laubrock, Jochen and Kliegl, Reinhold},
  title     = {The eye-voice span during reading aloud},
  series = {Frontiers in psychology},
  volume    = {6},
  journal   = {Frontiers in psychology},
  publisher = {Frontiers Research Foundation},
  address   = {Lausanne},
  issn      = {1664-1078},
  doi       = {10.3389/fpsyg.2015.01437},
  pages     = {19},
  year      = {2015},
  abstract  = {Although eye movements during reading are modulated by cognitive processing demands, they also reflect visual sampling of the input, and possibly preparation of output for speech or the inner voice. By simultaneously recording eye movements and the voice during reading aloud, we obtained an output measure that constrains the length of time spent on cognitive processing. Here we investigate the dynamics of the eye-voice span (EVS), the distance between eye and voice. We show that the EVS is regulated immediately during fixation of a word by either increasing fixation duration or programming a regressive eye movement against the reading direction. EVS size at the beginning of a fixation was positively correlated with the likelihood of regressions and refixations. Regression probability was further increased if the EVS was still large at the end of a fixation: if adjustment of fixation duration did not sufficiently reduce the EVS during a fixation, then a regression rather than a refixation followed with high probability. We further show that the EVS can help understand cognitive influences on fixation duration during reading: in mixed model analyses, the EVS was a stronger predictor of fixation durations than either word frequency or word length. The EVS modulated the influence of several other predictors on single fixation durations (SFDs). For example, word-N frequency effects were larger with a large EVS, especially when word N-1 frequency was low. Finally, a comparison of SFDs during oral and silent reading showed that reading is governed by similar principles in both reading modes, although EVS maintenance and articulatory processing also cause some differences. In summary, the EVS is regulated by adjusting fixation duration and/or by programming a regressive eye movement when the EVS gets too large. Overall, the EVS appears to be directly related to updating of the working memory buffer during reading.},
  language  = {en}
}
@article{SchroederWuerznerHeisteretal.2015,
  author    = {Schroeder, Sascha and W{\"u}rzner, Kay-Michael and Heister, Julian and Geyken, Alexander and Kliegl, Reinhold},
  title     = {childLex: a lexical database of German read by children},
  series = {Behavior research methods : a journal of the Psychonomic Society},
  volume    = {47},
  journal   = {Behavior research methods : a journal of the Psychonomic Society},
  number    = {4},
  publisher = {Springer},
  address   = {New York},
  issn      = {1554-351X},
  doi       = {10.3758/s13428-014-0528-1},
  pages     = {1085 -- 1094},
  year      = {2015},
  abstract  = {This article introduces childLex, an online database of German read by children. childLex is based on a corpus of children's books and comprises 10 million words that were syntactically annotated and lemmatized. childLex reports linguistic norms for lexical, superlexical, and sublexical variables in three different age groups: 6-8 (grades 1-2), 9-10 (grades 3-4), and 11-12 years (grades 5-6). Here, we describe how childLex was collected and analyzed. In addition, we provide information about the distributions of word frequency, word length, and orthographic neighborhood size, as well as their intercorrelations. Finally, we explain how childLex can be accessed using a Web interface.},
  language  = {en}
}
@article{HohensteinKliegl2014,
  author    = {Hohenstein, Sven and Kliegl, Reinhold},
  title     = {Semantic preview benefit during reading},
  series = {Journal of experimental psychology : Learning, memory, and cognition},
  volume    = {40},
  journal   = {Journal of experimental psychology : Learning, memory, and cognition},
  number    = {1},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0278-7393},
  doi       = {10.1037/a0033670},
  pages     = {166 -- 190},
  year      = {2014},
  abstract  = {Word features in parafoveal vision influence eye movements during reading. The question of whether readers extract semantic information from parafoveal words was studied in 3 experiments by using a gaze-contingent display change technique. Subjects read German sentences containing 1 of several preview words that were replaced by a target word during the saccade to the preview (boundary paradigm). In the 1st experiment the preview word was semantically related or unrelated to the target. Fixation durations on the target were shorter for semantically related than unrelated previews, consistent with a semantic preview benefit. In the 2nd experiment, half the sentences were presented following the rules of German spelling (i.e., previews and targets were printed with an initial capital letter), and the other half were presented completely in lowercase. A semantic preview benefit was obtained under both conditions. In the 3rd experiment, we introduced 2 further preview conditions, an identical word and a pronounceable nonword, while also manipulating the text contrast. Whereas the contrast had negligible effects, fixation durations on the target were reliably different for all 4 types of preview. Semantic preview benefits were greater for pretarget fixations closer to the boundary (large preview space) and, although not as consistently, for long pretarget fixation durations (long preview time). The results constrain theoretical proposals about eye movement control in reading.},
  language  = {en}
}
@article{FernandezShalomKliegletal.2014,
  author    = {Fernandez, Gerardo and Shalom, Diego E. and Kliegl, Reinhold and Sigman, Mariano},
  title     = {Eye movements during reading proverbs and regular sentences: the incoming word predictability effect},
  series = {Language, cognition and neuroscience},
  volume    = {29},
  journal   = {Language, cognition and neuroscience},
  number    = {3},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {2327-3798},
  doi       = {10.1080/01690965.2012.760745},
  pages     = {260 -- 273},
  year      = {2014},
  language  = {en}
}
@article{RisseHohensteinKliegletal.2014,
  author    = {Risse, Sarah and Hohenstein, Sven and Kliegl, Reinhold and Engbert, Ralf},
  title     = {A theoretical analysis of the perceptual span based on SWIFT simulations of the n+2 boundary paradigm},
  series = {Visual cognition},
  volume    = {22},
  journal   = {Visual cognition},
  number    = {3-4},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {1350-6285},
  doi       = {10.1080/13506285.2014.881444},
  pages     = {283 -- 308},
  year      = {2014},
  abstract  = {Eye-movement experiments suggest that the perceptual span during reading is larger than the fixated word, asymmetric around the fixation position, and shrinks in size contingent on the foveal processing load. We used the SWIFT model of eye-movement control during reading to test these hypotheses and their implications under the assumption of graded parallel processing of all words inside the perceptual span. Specifically, we simulated reading in the boundary paradigm and analysed the effects of denying the model to have valid preview of a parafoveal word n + 2 two words to the right of fixation. Optimizing the model parameters for the valid preview condition only, we obtained span parameters with remarkably realistic estimates conforming to the empirical findings on the size of the perceptual span. More importantly, the SWIFT model generated parafoveal processing up to word n + 2 without fitting the model to such preview effects. Our results suggest that asymmetry and dynamic modulation are plausible properties of the perceptual span in a parallel word-processing model such as SWIFT. Moreover, they seem to guide the flexible distribution of processing resources during reading between foveal and parafoveal words.},
  language  = {en}
}
@article{PanYanLaubrocketal.2014,
  author    = {Pan, Jinger and Yan, Ming and Laubrock, Jochen and Shu, Hua and Kliegl, Reinhold},
  title     = {Saccade-target selection of dyslexic children when reading Chinese},
  series = {Vision research : an international journal for functional aspects of vision.},
  volume    = {97},
  journal   = {Vision research : an international journal for functional aspects of vision.},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0042-6989},
  doi       = {10.1016/j.visres.2014.01.014},
  pages     = {24 -- 30},
  year      = {2014},
  abstract  = {This study investigates the eye movements of dyslexic children and their age-matched controls when reading Chinese. Dyslexic children exhibited more and longer fixations than age-matched control children, and an increase of word length resulted in a greater increase in the number of fixations and gaze durations for the dyslexic than for the control readers. The report focuses on the finding that there was a significant difference between the two groups in the fixation landing position as a function of word length in single-fixation cases, while there was no such difference in the initial fixation of multi-fixation cases. We also found that both groups had longer incoming saccade amplitudes while the launch sites were closer to the word in single fixation cases than in multi-fixation cases. Our results suggest that dyslexic children's inefficient lexical processing, in combination with the absence of orthographic word boundaries in Chinese, leads them to select saccade targets at the beginning of words conservatively. These findings provide further evidence for parafoveal word segmentation during reading of Chinese sentences.},
  language  = {en}
}
@article{RisseKliegl2014,
  author    = {Risse, Sarah and Kliegl, Reinhold},
  title     = {Dissociating preview validity and preview difficulty in parafoveal processing of word n+1 during reading},
  series = {Journal of experimental psychology : Human perception and performance},
  volume    = {40},
  journal   = {Journal of experimental psychology : Human perception and performance},
  number    = {2},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0096-1523},
  doi       = {10.1037/a0034997},
  pages     = {653 -- 668},
  year      = {2014},
  abstract  = {Many studies have shown that previewing the next word n + 1 during reading leads to substantial processing benefit (e.g., shorter word viewing times) when this word is eventually fixated. However, evidence of such preprocessing in fixations on the preceding word n when in fact the information about the preview is acquired is far less consistent. A recent study suggested that such effects may be delayed into fixations on the next word n + 1 (Risse \& Kliegl, 2012). To investigate the time course of parafoveal information-acquisition on the control of eye movements during reading, we conducted 2 gaze-contingent display-change experiments and orthogonally manipulated the processing difficulty (i.e., word frequency) of an n + 1 preview word and its validity relative to the target word. Preview difficulty did not affect fixation durations on the pretarget word n but on the target word n + 1. In fact, the delayed preview-difficulty effect was almost of the same size as the preview benefit associated with the n + 1 preview validity. Based on additional results from quantile-regression analyses on the time course of the 2 preview effects, we discuss consequences as to the integration of foveal and parafoveal information and potential implications for computational models of eye guidance in reading.},
  language  = {en}
}
@article{JuengerKlieglOberauer2014,
  author    = {J{\"u}nger, Elisabeth and Kliegl, Reinhold and Oberauer, Klaus},
  title     = {No evidence for feature overwriting in visual working memory},
  series = {Memory},
  volume    = {22},
  journal   = {Memory},
  number    = {4},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {0965-8211},
  pages     = {374 -- 389},
  year      = {2014},
  language  = {en}
}
@article{HofmannDambacherJacobsetal.2014,
  author    = {Hofmann, Markus J. and Dambacher, Michael and Jacobs, Arthur M. and Kliegl, Reinhold and Radach, Ralph and Kuchinke, Lars and Plichta, Michael M. and Fallgatter, Andreas J. and Herrmann, Martin J.},
  title     = {Occipital and orbitofrontal hemodynamics during naturally paced reading: An fNIRS study},
  series = {NeuroImage : a journal of brain function},
  volume    = {94},
  journal   = {NeuroImage : a journal of brain function},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {1053-8119},
  doi       = {10.1016/j.neuroimage.2014.03.014},
  pages     = {193 -- 202},
  year      = {2014},
  abstract  = {Humans typically read at incredibly fast rates, because they predict likely occurring words from a given context. Here, we used functional near-infrared spectroscopy (fNIRS) to track the ultra-rapid hemodynamic responses of words presented every 280 ms in a naturally paced sentence context. We found a lower occipital deoxygenation to unpredictable than to predictable words. The greater hemodynamic responses to unexpected words suggest that the visual features of expected words have been pre-activated previous to stimulus presentation. Second, we tested opposing theoretical proposals about the role of the medial orbitofrontal cortex (OFC): Either OFC may respond to the breach of expectation; or OFC is activated when the present stimulus matches the prediction. A significant interaction between word frequency and predictability indicated OFC responses to breaches of expectation for low- but not for high-frequency words: OFC is sensitive to both, bottom-up processing as mediated by word frequency, as well as top-down predictions. Particularly, when a rare word is unpredictable, OFC becomes active. Finally, we discuss how a high temporal resolution can help future studies to disentangle the hemodynamic responses of single trials in such an ultra-rapid event succession as naturally paced reading. (C) 2014 Elsevier Inc. All rights reserved.},
  language  = {en}
}
@article{YanZhouShuetal.2014,
  author    = {Yan, Ming and Zhou, Wei and Shu, Hua and Yusupu, Rizwangul and Miao, Dongxia and Kruegel, Andre and Kliegl, Reinhold},
  title     = {Eye movements guided by morphological structure: Evidence from the Uighur language},
  series = {Cognition : international journal of cognitive science},
  volume    = {132},
  journal   = {Cognition : international journal of cognitive science},
  number    = {2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0010-0277},
  doi       = {10.1016/j.cognition.2014.03.008},
  pages     = {181 -- 215},
  year      = {2014},
  abstract  = {It is generally accepted that low-level features (e.g., inter-word spaces) are responsible for saccade-target selection in eye-movement control during reading. In two experiments using Uighur script known for its rich suffixes, we demonstrate that, in addition to word length and launch site, the number of suffixes influences initial landing positions. We also demonstrate an influence of word frequency. These results are difficult to explain purely by low-level guidance of eye movements and indicate that due to properties specific to Uighur script low-level visual information and high-level information such as morphological structure of parafoveal words jointly influence saccade programming. (C) 2014 Elsevier B.V. All rights reserved.},
  language  = {en}
}
@article{BostonHaleVasishthetal.2011,
  author    = {Boston, Marisa Ferrara and Hale, John T. and Vasishth, Shravan and Kliegl, Reinhold},
  title     = {Parallel processing and sentence comprehension difficulty},
  series = {Language and cognitive processes},
  volume    = {26},
  journal   = {Language and cognitive processes},
  number    = {3},
  publisher = {Wiley},
  address   = {Hove},
  issn      = {0169-0965},
  doi       = {10.1080/01690965.2010.492228},
  pages     = {301 -- 349},
  year      = {2011},
  abstract  = {Eye fixation durations during normal reading correlate with processing difficulty, but the specific cognitive mechanisms reflected in these measures are not well understood. This study finds support in German readers' eye fixations for two distinct difficulty metrics: surprisal, which reflects the change in probabilities across syntactic analyses as new words are integrated; and retrieval, which quantifies comprehension difficulty in terms of working memory constraints. We examine the predictions of both metrics using a family of dependency parsers indexed by an upper limit on the number of candidate syntactic analyses they retain at successive words. Surprisal models all fixation measures and regression probability. By contrast, retrieval does not model any measure in serial processing. As more candidate analyses are considered in parallel at each word, retrieval can account for the same measures as surprisal. This pattern suggests an important role for ranked parallelism in theories of sentence comprehension.},
  language  = {en}
}
@article{KlieglWeiDambacheretal.2011,
  author    = {Kliegl, Reinhold and Wei, Ping and Dambacher, Michael and Yan, Ming and Zhou, Xiaolin},
  title     = {Experimental effects and individual differences in linear mixed models estimating the relationship between spatial, object, and attraction effects in visual attention},
  series = {Frontiers in psychology},
  volume    = {2},
  journal   = {Frontiers in psychology},
  publisher = {Frontiers Research Foundation},
  address   = {Lausanne},
  issn      = {1664-1078},
  doi       = {10.3389/fpsyg.2010.00238},
  pages     = {12},
  year      = {2011},
  abstract  = {Linear mixed models (LMMs) provide a still underused methodological perspective on combining experimental and individual-differences research. Here we illustrate this approach with two-rectangle cueing in visual attention (Egly et al., 1994). We replicated previous experimental cue-validity effects relating to a spatial shift of attention within an object (spatial effect), to attention switch between objects (object effect), and to the attraction of attention toward the display centroid (attraction effect), also taking into account the design-inherent imbalance of valid and other trials. We simultaneously estimated variance/covariance components of subject-related random effects for these spatial, object, and attraction effects in addition to their mean reaction times (RTs). The spatial effect showed a strong positive correlation with mean RT and a strong negative correlation with the attraction effect. The analysis of individual differences suggests that slow subjects engage attention more strongly at the cued location than fast subjects. We compare this joint LMM analysis of experimental effects and associated subject-related variances and correlations with two frequently used alternative statistical procedures.},
  language  = {en}
}
@article{ShuZhouYanetal.2011,
  author    = {Shu, Hua and Zhou, Wei and Yan, Ming and Kliegl, Reinhold},
  title     = {Font size modulates saccade-target selection in Chinese reading},
  series = {Attention, perception, \& psychophysics : AP\&P ; a journal of the Psychonomic Society, Inc.},
  volume    = {73},
  journal   = {Attention, perception, \& psychophysics : AP\&P ; a journal of the Psychonomic Society, Inc.},
  number    = {2},
  publisher = {Springer},
  address   = {New York},
  issn      = {1943-3921},
  doi       = {10.3758/s13414-010-0029-y},
  pages     = {482 -- 490},
  year      = {2011},
  abstract  = {In alphabetic writing systems, saccade amplitude (a close correlate of reading speed) is independent of font size, presumably because an increase in the angular size of letters is compensated for by a decrease of visual acuity with eccentricity. We propose that this invariance may (also) be due to the presence of spaces between words, guiding the eyes across a large range of font sizes. Here, we test whether saccade amplitude is also invariant against manipulations of font size during reading Chinese, a character-based writing system without spaces as explicit word boundaries for saccade-target selection. In contrast to word-spaced alphabetic writing systems, saccade amplitude decreased significantly with increased font size, leading to an increase in the number of fixations at the beginning of words and in the number of refixations. These results are consistent with a model which assumes that word beginning (rather than word center) is the default saccade target if the length of the parafoveal word is not available.},
  language  = {en}
}
@article{KlieglBates2011,
  author    = {Kliegl, Reinhold and Bates, Douglas},
  title     = {International collaboration in psychology is on the rise},
  series = {Scientometrics : an international journal for all quantitative aspects of the science of science, communication in science and science policy},
  volume    = {87},
  journal   = {Scientometrics : an international journal for all quantitative aspects of the science of science, communication in science and science policy},
  number    = {1},
  publisher = {Springer},
  address   = {Dordrecht},
  issn      = {0138-9130},
  doi       = {10.1007/s11192-010-0299-0},
  pages     = {149 -- 158},
  year      = {2011},
  abstract  = {There has been a substantial increase in the percentage for publications with co-authors located in departments from different countries in 12 major journals of psychology. The results are evidence for a remarkable internationalization of psychological research, starting in the mid 1970s and increasing in rate at the beginning of the 1990s. This growth occurs against a constant number of articles with authors from the same country; it is not due to a concomitant increase in the number of co-authors per article. Thus, international collaboration in psychology is obviously on the rise.},
  language  = {en}
}
@article{RisseKliegl2011,
  author    = {Risse, Sarah and Kliegl, Reinhold},
  title     = {Adult age differences in the perceptual span during reading},
  series = {Psychology and aging},
  volume    = {26},
  journal   = {Psychology and aging},
  number    = {2},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0882-7974},
  doi       = {10.1037/a0021616},
  pages     = {451 -- 460},
  year      = {2011},
  abstract  = {Following up on research suggesting an age-related reduction in the rightward extent of the perceptual span during reading (Rayner, Castelhano, \& Yang, 2009), we compared old and young adults in an N + 2-boundary paradigm in which a nonword preview of word N + 2 or word N + 2 itself is replaced by the target word once the eyes cross an invisible boundary located after word N. The intermediate word N + I was always three letters long. Gaze durations on word N + 2 were significantly shorter for identical than nonword N + 2 preview both for young and for old adults, with no significant difference in this preview benefit. Young adults, however, did modulate their gaze duration on word N more strongly than old adults in response to the difficulty of the parafoveal word N + I. Taken together, the results suggest a dissociation of preview benefit and parafoveal-on-foveal effect. Results are discussed in terms of age-related decline in resilience towards distributed processing while simultaneously preserving the ability to integrate parafoveal information into foveal processing. As such, the present results relate to proposals of regulatory compensation strategies older adults use to secure an overall reading speed very similar to that of young adults.},
  language  = {en}
}
@article{OhlBrandtKliegl2011,
  author    = {Ohl, Sven and Brandt, Stephan A. and Kliegl, Reinhold},
  title     = {Secondary (micro-)saccades the influence of primary saccade end point and target eccentricity on the process of postsaccadic fixation},
  series = {Vision research : an international journal for functional aspects of vision.},
  volume    = {51},
  journal   = {Vision research : an international journal for functional aspects of vision.},
  number    = {23-24},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0042-6989},
  doi       = {10.1016/j.visres.2011.09.005},
  pages     = {2340 -- 2347},
  year      = {2011},
  abstract  = {We examine how the size of saccadic under-/overshoot and target eccentricity influence the latency, amplitude and orientation of secondary (micro-)saccades. In our experiment, a target appeared at an eccentricity of either 6 degrees or 14 degrees of visual angle. Subjects were instructed to direct their gaze as quickly as possible to the target and hold fixation at the new location until the end of the trial. Typically, increasing saccadic error is associated with faster and larger secondary saccades. We show that secondary saccades at distant in contrast to close targets have in a specific error range a shorter latency, larger amplitude, and follow more often the direction of the primary saccade. Finally, we demonstrate that an undershooting primary saccade is followed almost exclusively by secondary saccades into the same direction while overshooting primary saccades are followed by secondary saccades into both directions. This supports the notion that under- and overshooting imply different consequences for postsaccadic oculomotor processing. Results are discussed using a model, introduced by Rolfs, Kliegl, and Engbert (2008), to account for the generation of microsaccades. We argue that the dynamic interplay of target eccentricity and the magnitude of the saccadic under-/overshoot can be explained by a different strength of activation in the two hemispheres of the saccadic motor map in this model.},
  language  = {en}
}
@article{KlieglDambacherDimigenetal.2012,
  author    = {Kliegl, Reinhold and Dambacher, Michael and Dimigen, Olaf and Jacobs, Arthur M. and Sommer, Werner},
  title     = {Eye movements and brain electric potentials during reading},
  series = {Psychological research : an international journal of perception, attention, memory, and action},
  volume    = {76},
  journal   = {Psychological research : an international journal of perception, attention, memory, and action},
  number    = {2},
  publisher = {Springer},
  address   = {Heidelberg},
  issn      = {0340-0727},
  doi       = {10.1007/s00426-011-0376-x},
  pages     = {145 -- 158},
  year      = {2012},
  abstract  = {The development of theories and computational models of reading requires an understanding of processing constraints, in particular of timelines related to word recognition and oculomotor control. Timelines of word recognition are usually determined with event-related potentials (ERPs) recorded under conditions of serial visual presentation (SVP) of words; timelines of oculomotor control are derived from parameters of eye movements (EMs) during natural reading. We describe two strategies to integrate these approaches. One is to collect ERPs and EMs in separate SVP and natural reading experiments for the same experimental material (but different subjects). The other strategy is to co-register EMs and ERPs during natural reading from the same subjects. Both strategies yield data that allow us to determine how lexical properties influence ERPs (e.g., the N400 component) and EMs (e.g., fixation durations) across neighboring words. We review our recent research on the effects of frequency and predictability of words on both EM and ERP measures with reference to current models of eye-movement control during reading. Results are in support of the proposition that lexical access is distributed across several fixations and across brain-electric potentials measured on neighboring words.},
  language  = {en}
}
@article{GoetheEsserGendtetal.2012,
  author    = {Goethe, Katrin and Esser, G{\"u}nter and Gendt, Anja and Kliegl, Reinhold},
  title     = {Working memory in children tracing age differences and special educational needs to parameters of a formal model},
  series = {Developmental psychology},
  volume    = {48},
  journal   = {Developmental psychology},
  number    = {2},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0012-1649},
  doi       = {10.1037/a0025660},
  pages     = {459 -- 476},
  year      = {2012},
  abstract  = {Parameters of a formal working-memory model were estimated for verbal and spatial memory updating of children. The model proposes interference though feature overwriting and through confusion of whole elements as the primary cause of working-memory capacity limits. We tested 2 age groups each containing 1 group of normal intelligence and I deficit group. For young children the deficit was developmental dyslexia; for older children it was a general learning difficulty. The interference model predicts less interference through overwriting but more through confusion of whole elements for the dyslexic children than for their age-matched controls. Older children exhibited less interference through confusion of whole elements and a higher processing rate than young children, but general learning difficulty was associated with slower processing than in the age-matched control group. Furthermore, the difference between verbal and spatial updating mapped onto several meaningful dissociations of model parameters.},
  language  = {en}
}
@article{YanRisseZhouetal.2012,
  author    = {Yan, Ming and Risse, Sarah and Zhou, Xiaolin and Kliegl, Reinhold},
  title     = {Preview fixation duration modulates identical and semantic preview benefit in Chinese reading},
  series = {Reading and writing : an interdisciplinary journal},
  volume    = {25},
  journal   = {Reading and writing : an interdisciplinary journal},
  number    = {5},
  publisher = {Springer},
  address   = {Dordrecht},
  issn      = {0922-4777},
  doi       = {10.1007/s11145-010-9274-7},
  pages     = {1093 -- 1111},
  year      = {2012},
  abstract  = {Semantic preview benefit from parafoveal words is critical for proposals of distributed lexical processing during reading. Semantic preview benefit has been demonstrated for Chinese reading with the boundary paradigm in which unrelated or semantically related previews of a target word N + 1 are replaced by the target word once the eyes cross an invisible boundary located after word N (Yan et al., 2009); for the target word in position N + 2, only identical compared to unrelated-word preview led to shorter fixation times on the target word (Yan et al., in press). A reanalysis of these data reveals that identical and semantic preview benefits depend on preview duration (i.e., the fixation duration on the preboundary word). Identical preview benefit from word N + 1 increased with preview duration. The identical preview benefit was also significant for N + 2, but did not significantly interact with preview duration. The previously reported semantic preview benefit from word N + 1 was mainly due to single- or first-fixation durations following short previews. We discuss implications for notions of serial attention shifts and parallel distributed processing of words during reading.},
  language  = {en}
}
@article{YanZhouShuetal.2012,
  author    = {Yan, Ming and Zhou, Wei and Shu, Hua and Kliegl, Reinhold},
  title     = {Lexical and sublexical semantic preview benefits in chinese reading},
  series = {Journal of experimental psychology : Learning, memory, and cognition},
  volume    = {38},
  journal   = {Journal of experimental psychology : Learning, memory, and cognition},
  number    = {4},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0278-7393},
  doi       = {10.1037/a0026935},
  pages     = {1069 -- 1075},
  year      = {2012},
  abstract  = {Semantic processing from parafoveal words is an elusive phenomenon in alphabetic languages, but it has been demonstrated only for a restricted set of noncompound Chinese characters. Using the gaze-contingent boundary paradigm, this experiment examined whether parafoveal lexical and sublexical semantic information was extracted from compound preview characters. Results generalized parafoveal semantic processing to this representative set of Chinese characters and extended the parafoveal processing to radical (sublexical) level semantic information extraction. Implications for notions of parafoveal information extraction during Chinese reading are discussed.},
  language  = {en}
}
@article{DambacherDimigenBraunetal.2012,
  author    = {Dambacher, Michael and Dimigen, Olaf and Braun, Mario and Wille, Kristin and Jacobs, Arthur M. and Kliegl, Reinhold},
  title     = {Stimulus onset asynchrony and the timeline of word recognition: Event-related potentials during sentence reading},
  series = {Neuropsychologia : an international journal in behavioural and cognitive neuroscience},
  volume    = {50},
  journal   = {Neuropsychologia : an international journal in behavioural and cognitive neuroscience},
  number    = {8},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0028-3932},
  doi       = {10.1016/j.neuropsychologia.2012.04.011},
  pages     = {1852 -- 1870},
  year      = {2012},
  abstract  = {Three ERP experiments examined the effect of word presentation rate (i.e., stimulus onset asynchrony, SOA) on the time course of word frequency and predictability effects in sentence reading. In Experiments 1 and 2, sentences were presented word-by-word in the screen center at an SOA of 700 and 490 ms, respectively. While these rates are typical for psycholinguistic ERP research, natural reading happens at a considerably faster pace. Accordingly. Experiment 3 employed a near-normal SOA of 280 ms, which approximated the rate of normal reading. Main results can be summarized as follows: (1) The onset latency of early frequency effects decreases gradually with increasing presentation rates. (2) An early interaction between top-down and bottom-up processing is observed only under a near-normal SOA. (3) N400 predictability effects occur later and are smaller at a near-normal (i.e., high) presentation rate than at the lower rates commonly used in ERP experiments. (4) ERP morphology is different at the shortest compared to longer SOAs. Together, the results point to a special role of a near-normal presentation rate for visual word recognition and therefore suggest that SOA should be taken into account in research of natural reading.},
  language  = {en}
}
@article{DimigenKlieglSommer2012,
  author    = {Dimigen, Olaf and Kliegl, Reinhold and Sommer, Werner},
  title     = {Trans-saccadic parafoveal preview benefits in fluent reading: A study with fixation-related brain potentials},
  series = {NeuroImage : a journal of brain function},
  volume    = {62},
  journal   = {NeuroImage : a journal of brain function},
  number    = {1},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {1053-8119},
  doi       = {10.1016/j.neuroimage.2012.04.006},
  pages     = {381 -- 393},
  year      = {2012},
  abstract  = {During natural reading, a parafoveal preview of the upcoming word facilitates its subsequent recognition (e.g., shorter fixation durations compared to masked preview) but nothing is known about the neural correlates of this so-called preview benefit. Furthermore, while the evidence is strong that readers preprocess orthographic features of upcoming words, it is controversial whether word meaning can also be accessed parafoveally. We investigated the timing, scope, and electrophysiological correlates of parafoveal information use in reading by simultaneously recording eye movements and fixation-related brain potentials (FRPs) while participants read word lists fluently from left to right. For one word the target (e.g., "blade") parafoveal information was manipulated by showing an identical ("blade"), semantically related ("knife"), or unrelated ("sugar") word as preview. In boundary trials, the preview was shown parafoveally but changed to the correct target word during the incoming saccade. Replicating classic findings, target words were fixated shorter after identical previews. In the EEG, this benefit was reflected in an occipitotemporal preview positivity between 200 and 280 ms. In contrast, there was no facilitation from related previews. In parafoveal-on-foveal trials, preview and target were embedded at neighboring list positions without a display change. Consecutive fixation of two related words produced N400 priming effects, but only shortly (160 ms) after the second word was directly fixated. Results demonstrate that neural responses to words are substantially altered by parafoveal preprocessing under normal reading conditions. We found no evidence that word meaning contributes to these effects. Saccade-contingent display manipulations can be combined with EEG recordings to study extrafoveal perception in vision.},
  language  = {en}
}
@article{RisseKliegl2012,
  author    = {Risse, Sarah and Kliegl, Reinhold},
  title     = {Evidence for delayed Parafoveal-on-Foveal effects from word n+2 in reading},
  series = {Journal of experimental psychology : Human perception and performance},
  volume    = {38},
  journal   = {Journal of experimental psychology : Human perception and performance},
  number    = {4},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0096-1523},
  doi       = {10.1037/a0027735},
  pages     = {1026 -- 1042},
  year      = {2012},
  abstract  = {During reading information is acquired from word(s) beyond the word that is currently looked at. It is still an open question whether such parafoveal information can influence the current viewing of a word, and if so, whether such parafoveal-on-foveal effects are attributable to distributed processing or to mislocated fixations which occur when the eyes are directed at a parafoveal word but land on another word instead. In two display-change experiments, we orthogonally manipulated the preview and target difficulty of word n+2 to investigate the role of mislocated fixations on the previous word n+1. When the eyes left word n, an easy or difficult word n+2 preview was replaced by an easy or difficult n+2 target word. In Experiment 1, n+2 processing difficulty was manipulated by means of word frequency (i.e., easy high-frequency vs. difficult low-frequency word n+2). In Experiment 2, we varied the visual familiarity of word n+2 (i.e., easy lower-case vs. difficult alternating-case writing). Fixations on the short word n+1, which were likely to be mislocated, were nevertheless not influenced by the difficulty of the adjacent word n+2, the hypothesized target of the mislocated fixation. Instead word n+1 was influenced by the preview difficulty of word n+2, representing a delayed parafoveal-on-foveal effect. The results challenge the mislocated-fixation hypothesis as an explanation of parafoveal-on-foveal effects and provide new insight into the complex spatial and temporal effect structure of processing inside the perceptual span during reading.},
  language  = {en}
}
@article{TsaiKlieglYan2012,
  author    = {Tsai, Jie-Li and Kliegl, Reinhold and Yan, Ming},
  title     = {Parafoveal semantic information extraction in traditional Chinese reading},
  series = {Acta psychologica : international journal of psychonomics},
  volume    = {141},
  journal   = {Acta psychologica : international journal of psychonomics},
  number    = {1},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0001-6918},
  doi       = {10.1016/j.actpsy.2012.06.004},
  pages     = {17 -- 23},
  year      = {2012},
  abstract  = {Semantic information extraction from the parafovea has been reported only in simplified Chinese for a special subset of characters and its generalizability has been questioned. This study uses traditional Chinese, which differs from simplified Chinese in visual complexity and in mapping semantic forms, to demonstrate access to parafoveal semantic information during reading of this script. Preview duration modulates various types (identical, phonological, and unrelated) of parafoveal information extraction. Parafoveal semantic extraction is more elusive in English; therefore, we conclude that such effects in Chinese are presumably caused by substantial cross-language differences from alphabetic scripts. The property of Chinese characters carrying rich lexical information in a small region provides the possibility of semantic extraction in the parafovea.},
  language  = {en}
}
@article{OhlBrandtKliegl2013,
  author    = {Ohl, Sven and Brandt, Stephan A. and Kliegl, Reinhold},
  title     = {The generation of secondary saccades without postsaccadic visual feedback},
  series = {Journal of vision},
  volume    = {13},
  journal   = {Journal of vision},
  number    = {5},
  publisher = {Association for Research in Vision and Opthalmology},
  address   = {Rockville},
  issn      = {1534-7362},
  doi       = {10.1167/13.5.11},
  pages     = {23},
  year      = {2013},
  abstract  = {Primary saccades are often followed by small secondary saccades, which are generally thought to reduce the distance between the saccade endpoint and target location. Accumulated evidence demonstrates that secondary saccades are subject to various influences, among which retinal feedback during postsaccadic fixation constitutes only one important signal. Recently, we reported that target eccentricity and an orientation bias influence the generation of secondary saccades. In the present study, we examine secondary saccades in the absence of postsaccadic visual feedback. Although extraretinal signals (e.g., efference copy) have received widespread attention in eye-movement studies, it is still unclear whether an extraretinal error signal contributes to the programming of secondary saccades. We have observed that secondary saccade latency and amplitude depend on primary saccade error despite the absence of postsaccadic visual feedback. Strong evidence for an extraretinal error signal influencing secondary saccade programming is given by the observation that secondary saccades are more likely to be oriented in a direction opposite to the primary saccade as primary saccade error shifts from target undershoot to overshoot. We further show how the functional relationship between primary saccade landing position and secondary saccade characteristics varies as a function of target eccentricity. We propose that initial target eccentricity and an extraretinal error signal codetermine the postsaccadic activity distribution in the saccadic motor map when no visual feedback is available.},
  language  = {en}
}
@article{KlieglHohensteinYanetal.2013,
  author    = {Kliegl, Reinhold and Hohenstein, Sven and Yan, Ming and McDonald, Scott A.},
  title     = {How preview space/time translates into preview cost/benefit for fixation durations during reading},
  series = {The quarterly journal of experimental psychology},
  volume    = {66},
  journal   = {The quarterly journal of experimental psychology},
  number    = {3},
  publisher = {Wiley},
  address   = {Hove},
  issn      = {1747-0218},
  doi       = {10.1080/17470218.2012.658073},
  pages     = {581 -- 600},
  year      = {2013},
  abstract  = {Eye-movement control during reading depends on foveal and parafoveal information. If the parafoveal preview of the next word is suppressed, reading is less efficient. A linear mixed model (LMM) reanalysis of McDonald (2006) confirmed his observation that preview benefit may be limited to parafoveal words that have been selected as the saccade target. Going beyond the original analyses, in the same LMM, we examined how the preview effect (i.e., the difference in single-fixation duration, SFD, between random-letter and identical preview) depends on the gaze duration on the pretarget word and on the amplitude of the saccade moving the eye onto the target word. There were two key results: (a) The shorter the saccade amplitude (i.e., the larger preview space), the shorter a subsequent SFD with an identical preview; this association was not observed with a random-letter preview. (b) However, the longer the gaze duration on the pretarget word, the longer the subsequent SFD on the target, with the difference between random-letter string and identical previews increasing with preview time. A third patternincreasing cost of a random-letter string in the parafovea associated with shorter saccade amplitudeswas observed for target gaze durations. Thus, LMMs revealed that preview effects, which are typically summarized under preview benefit, are a complex mixture of preview cost and preview benefit and vary with preview space and preview time. The consequence for reading is that parafoveal preview may not only facilitate, but also interfere with lexical access.},
  language  = {en}
}
@article{WotschackKliegl2013,
  author    = {Wotschack, Christiane and Kliegl, Reinhold},
  title     = {Reading strategy modulates parafoveal-on-foveal effects in sentence reading},
  series = {The quarterly journal of experimental psychology},
  volume    = {66},
  journal   = {The quarterly journal of experimental psychology},
  number    = {3},
  publisher = {Wiley},
  address   = {Hove},
  issn      = {1747-0218},
  doi       = {10.1080/17470218.2011.625094},
  pages     = {548 -- 562},
  year      = {2013},
  abstract  = {Task demands and individual differences have been linked reliably to word skipping during reading. Such differences in fixation probability may imply a selection effect for multivariate analyses of eye-movement corpora if selection effects correlate with word properties of skipped words. For example, with fewer fixations on short and highly frequent words the power to detect parafoveal-on-foveal effects is reduced. We demonstrate that increasing the fixation probability on function words with a manipulation of the expected difficulty and frequency of questions reduces an age difference in skipping probability (i.e., old adults become comparable to young adults) and helps to uncover significant parafoveal-on-foveal effects in this group of old adults. We discuss implications for the comparison of results of eye-movement research based on multivariate analysis of corpus data with those from display-contingent manipulations of target words.},
  language  = {en}
}
@article{AsendorpfConnerDeFruytetal.2013,
  author    = {Asendorpf, Jens B. and Conner, Mark and De Fruyt, Filip and De Houwer, Jan and Denissen, Jaap J. A. and Fiedler, Klaus and Fiedler, Susann and Funder, David C. and Kliegl, Reinhold and Nosek, Brian A. and Perugini, Marco and Roberts, Brent W. and Schmitt, Manfred and vanAken, Marcel A. G. and Weber, Hannelore and Wicherts, Jelte M.},
  title     = {Recommendations for increasing replicability in psychology},
  series = {European journal of personality},
  volume    = {27},
  journal   = {European journal of personality},
  number    = {2},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {0890-2070},
  doi       = {10.1002/per.1919},
  pages     = {108 -- 119},
  year      = {2013},
  abstract  = {Replicability of findings is at the heart of any empirical science. The aim of this article is to move the current replicability debate in psychology towards concrete recommendations for improvement. We focus on research practices but also offer guidelines for reviewers, editors, journal management, teachers, granting institutions, and university promotion committees, highlighting some of the emerging and existing practical solutions that can facilitate implementation of these recommendations. The challenges for improving replicability in psychological science are systemic. Improvement can occur only if changes are made at many levels of practice, evaluation, and reward.},
  language  = {en}
}
@article{ZhouKlieglYan2013,
  author    = {Zhou, Wei and Kliegl, Reinhold and Yan, Ming},
  title     = {A validation of parafoveal semantic information extraction in reading Chinese},
  series = {Journal of research in reading : a journal of the United Kingdom Reading Association},
  volume    = {36},
  journal   = {Journal of research in reading : a journal of the United Kingdom Reading Association},
  number    = {2},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {0141-0423},
  doi       = {10.1111/j.1467-9817.2013.01556.x},
  pages     = {S51 -- S63},
  year      = {2013},
  abstract  = {Parafoveal semantic processing has recently been well documented in reading Chinese sentences, presumably because of language-specific features. However, because of a large variation of fixation landing positions on pretarget words, some preview words actually were located in foveal vision when readers' eyes landed close to the end of the pretarget words. None of the previous studies has completely ruled out a possibility that the semantic preview effects might mainly arise from these foveally processed preview words. This case, whether previously observed positive evidence for parafoveal semantic processing can still hold, has been called into question. Using linear mixed models, we demonstrate in this study that semantic preview benefit from word N+1 decreased if fixation on pretarget word N was close to the preview. We argue that parafoveal semantic processing is not a consequence of foveally processed preview words.},
  language  = {en}
}
@article{MassonKliegl2013,
  author    = {Masson, Michael E. J. and Kliegl, Reinhold},
  title     = {Modulation of additive and interactive effects in lexical decision by Trial History},
  series = {Journal of experimental psychology : Learning, memory, and cognition},
  volume    = {39},
  journal   = {Journal of experimental psychology : Learning, memory, and cognition},
  number    = {3},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0278-7393},
  doi       = {10.1037/a0029180},
  pages     = {898 -- 914},
  year      = {2013},
  abstract  = {Additive and interactive effects of word frequency, stimulus quality, and semantic priming have been used to test theoretical claims about the cognitive architecture of word-reading processes. Additive effects among these factors have been taken as evidence for discrete-stage models of word reading. We present evidence from linear mixed-model analyses applied to 2 lexical decision experiments indicating that apparent additive effects can be the product of aggregating over- and underadditive interaction effects that are modulated by recent trial history, particularly the lexical status and stimulus quality of the previous trial's target. Even a simple practice effect expressed as improved response speed across trials was powerfully modulated by the nature of the previous target item. These results suggest that additivity and interaction between factors may reflect trial-to-trial variation in stimulus representations and decision processes rather than fundamental differences in processing architecture.},
  language  = {en}
}
@article{YanPanLaubrocketal.2013,
  author    = {Yan, Ming and Pan, Jinger and Laubrock, Jochen and Kliegl, Reinhold and Shu, Hua},
  title     = {Parafoveal processing efficiency in rapid automatized naming a comparison between Chinese normal and dyslexic children},
  series = {Journal of experimental child psychology},
  volume    = {115},
  journal   = {Journal of experimental child psychology},
  number    = {3},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {0022-0965},
  doi       = {10.1016/j.jecp.2013.01.007},
  pages     = {579 -- 589},
  year      = {2013},
  abstract  = {Dyslexic children are known to be slower than normal readers in rapid automatized naming (RAN). This suggests that dyslexics encounter local processing difficulties, which presumably induce a narrower perceptual span. Consequently, dyslexics should suffer less than normal readers from removing parafoveal preview. Here we used a gaze-contingent moving window paradigm in a RAN task to experimentally test this prediction. Results indicate that dyslexics extract less parafoveal information than control children. We propose that more attentional resources are recruited to the foveal processing because of dyslexics' less automatized translation of visual symbols into phonological output, thereby causing a reduction of the perceptual span. This in turn leads to less efficient preactivation of parafoveal information and, hence, more difficulty in processing the next foveal item.},
  language  = {en}
}
@article{EngelmannVasishthEngbertetal.2013,
  author    = {Engelmann, Felix and Vasishth, Shravan and Engbert, Ralf and Kliegl, Reinhold},
  title     = {A framework for modeling the interaction of syntactic processing and eye movement control},
  series = {Topics in cognitive science},
  volume    = {5},
  journal   = {Topics in cognitive science},
  number    = {3},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {1756-8757},
  doi       = {10.1111/tops.12026},
  pages     = {452 -- 474},
  year      = {2013},
  abstract  = {We explore the interaction between oculomotor control and language comprehension on the sentence level using two well-tested computational accounts of parsing difficulty. Previous work (Boston, Hale, Vasishth, \& Kliegl, 2011) has shown that surprisal (Hale, 2001; Levy, 2008) and cue-based memory retrieval (Lewis \& Vasishth, 2005) are significant and complementary predictors of reading time in an eyetracking corpus. It remains an open question how the sentence processor interacts with oculomotor control. Using a simple linking hypothesis proposed in Reichle, Warren, and McConnell (2009), we integrated both measures with the eye movement model EMMA (Salvucci, 2001) inside the cognitive architecture ACT-R (Anderson et al., 2004). We built a reading model that could initiate short Time Out regressions (Mitchell, Shen, Green, \& Hodgson, 2008) that compensate for slow postlexical processing. This simple interaction enabled the model to predict the re-reading of words based on parsing difficulty. The model was evaluated in different configurations on the prediction of frequency effects on the Potsdam Sentence Corpus. The extension of EMMA with postlexical processing improved its predictions and reproduced re-reading rates and durations with a reasonable fit to the data. This demonstration, based on simple and independently motivated assumptions, serves as a foundational step toward a precise investigation of the interaction between high-level language processing and eye movement control.},
  language  = {en}
}
@article{RodriguezVillagraGoetheOberaueretal.2013,
  author    = {Rodriguez-Villagra, Odir Antonio and G{\"o}the, Katrin and Oberauer, Klaus and Kliegl, Reinhold},
  title     = {Working memory capacity in a go/no-go task - age differences in interference, processing speed, and attentional control},
  series = {Developmental psychology},
  volume    = {49},
  journal   = {Developmental psychology},
  number    = {9},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0012-1649},
  doi       = {10.1037/a0030883},
  pages     = {1683 -- 1696},
  year      = {2013},
  abstract  = {We tested the limits of working-memory capacity (WMC) of young adults, old adults, and children with a memory-updating task. The task consisted of mentally shifting spatial positions within a grid according to arrows, their color signaling either only go (control) or go/no-go conditions. The interference model (IM) of Oberauer and Kliegl (2006) was simultaneously fitted to the data of all groups. In addition to the 3 main model parameters (feature overlap, noise, and processing rate), we estimated the time for switching between go and no-go steps as a new model parameter. In this study, we examined the IM parameters across the life span. The IM parameter estimates show that (a) conditions were not different in interference by feature overlap and interference by confusion; (b) switching costs time; (c) young adults and children were less susceptible than old adults to interference due to feature overlap; (d) noise was highest for children, followed by old and young adults; (e) old adults differed from children and young adults in lower processing rate; and (f) children and old adults had a larger switch cost between go steps and no-go steps. Thus, the results of this study indicated that across age, the IM parameters contribute distinctively for explaining the limits of WMC.},
  language  = {en}
}
@article{DambacherSlatteryYangetal.2013,
  author    = {Dambacher, Michael and Slattery, Timothy J. and Yang, Jinmian and Kliegl, Reinhold and Rayner, Keith},
  title     = {Evidence for direct control of eye movements during reading},
  series = {Journal of experimental psychology : Human perception and performance},
  volume    = {39},
  journal   = {Journal of experimental psychology : Human perception and performance},
  number    = {5},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0096-1523},
  doi       = {10.1037/a0031647},
  pages     = {1468 -- 1484},
  year      = {2013},
  abstract  = {It is well established that fixation durations during reading vary with processing difficulty, but there are different views on how oculomotor control, visual perception, shifts of attention, and lexical (and higher cognitive) processing are coordinated. Evidence for a one-to-one translation of input delay into saccadic latency would provide a much needed constraint for current theoretical proposals. Here, we tested predictions of such a direct-control perspective using the stimulus-onset delay (SOD) paradigm. Words in sentences were initially masked and, on fixation, were individually unmasked with a delay (0-, 33-, 66-, 99-ms SODs). In Experiment 1, SODs were constant for all words in a sentence; in Experiment 2, SODs were manipulated on target words, while nontargets were unmasked without delay. In accordance with predictions of direct control, nonzero SODs entailed equivalent increases in fixation durations in both experiments. Yet, a population of short fixations pointed to rapid saccades as a consequence of low-level information at nonoptimal viewing positions rather than of lexical processing. Implications of these results for theoretical accounts of oculomotor control are discussed.},
  language  = {en}
}
@article{PanYanLaubrocketal.2013,
  author    = {Pan, Jinger and Yan, Ming and Laubrock, Jochen and Shu, Hua and Kliegl, Reinhold},
  title     = {Eye-voice span during rapid automatized naming of digits and dice in Chinese normal and dyslexic children},
  series = {Developmental science.},
  volume    = {16},
  journal   = {Developmental science.},
  number    = {6},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {1467-7687},
  doi       = {10.1111/desc.12075},
  pages     = {967 -- 979},
  year      = {2013},
  abstract  = {We measured Chinese dyslexic and control children's eye movements during rapid automatized naming (RAN) with alphanumeric (digits) and symbolic (dice surfaces) stimuli. Both types of stimuli required identical oral responses, controlling for effects associated with speech production. Results showed that naming dice was much slower than naming digits for both groups, but group differences in eye-movement measures and in the eye-voice span (i.e. the distance between the currently fixated item and the voiced item) were generally larger in digit-RAN than in dice-RAN. In addition, dyslexics were less efficient in parafoveal processing in these RAN tasks. Since the two RAN tasks required the same phonological output and on the assumption that naming dice is less practiced than naming digits in general, the results suggest that the translation of alphanumeric visual symbols into phonological codes is less efficient in dyslexic children. The dissociation of the print-to-sound conversion and phonological representation suggests that the degree of automaticity in translation from visual symbols to phonological codes in addition to phonological processing per se is also critical to understanding dyslexia.},
  language  = {en}
}
@article{Kliegl2008,
  author    = {Kliegl, Reinhold},
  title     = {Publication statistics show collaboration, not competition},
  year      = {2008},
  language  = {en}
}
@article{ThompsonKliegl1991,
  author    = {Thompson, Laura A. and Kliegl, Reinhold},
  title     = {Adult age effects of plausibility on memory : the role of time constraints during encoding},
  year      = {1991},
  language  = {en}
}
@article{SimonCarbreraKliegl1993,
  author    = {Simon, Tony and Carbrera, Angel and Kliegl, Reinhold},
  title     = {A new approach to the study of subitizing as distinct enumeration processing},
  isbn      = {0-8058- 1487-6},
  year      = {1993},
  language  = {en}
}
@article{MayrKliegl1993,
  author    = {Mayr, Ulrich and Kliegl, Reinhold},
  title     = {Sequential and coordinative complexity : age-based processing limitations in figural transformation},
  issn      = {0278-7393},
  year      = {1993},
  abstract  = {Dimensions of cognitive complexity in figural transformations were examined in the context of adult age differences. Sequential complexity was manipulated through figural transformations of single objects in a multiple- object array. Coordinative complexity was induced through spatial or nonspatial transformations of the entire array. Results confirmed the prediction that age-related slowing is larger in coordinative complexity than in sequential complexity conditions. The effect was stable across 8 sessions (Exp 1), was obtained when age groups were equated in accuracy with criterion-referenced testing (Exp 2), and was corroborated by age-differential probabilities of error types (Exps 1 and 2). A model is proposed attributing age effects under coordinative complexity to 2 factors: (1) basic- level slowing and (2) time-consuming reiterations through the processing sequence due to age-related working memory failures. (PsycINFO Database Record (c) 2012 APA, all rights reserved)},
  language  = {en}
}
@article{KlieglPhilipp2002,
  author    = {Kliegl, Reinhold and Philipp, Doris},
  title     = {Cognitive plasticity},
  isbn      = {0-7619-5494-5},
  year      = {2002},
  language  = {en}
}
@article{EngbertNuthmannKliegl2007,
  author    = {Engbert, Ralf and Nuthmann, Antje and Kliegl, Reinhold},
  title     = {An lterative algorithm for the estimation of the distribution of mislocated fixations during reading},
  isbn      = {978-0-08-044980-7},
  year      = {2007},
  language  = {en}
}
@article{BohnKliegl2007,
  author    = {Bohn, Christiane and Kliegl, Reinhold},
  title     = {Post-interpretive processes influence interpretive processing during reading: evidence from eye movements},
  isbn      = {978-18-4169-96-9},
  year      = {2007},
  language  = {en}
}
@article{KlieglWeiDambacheretal.2010,
  author    = {Kliegl, Reinhold and Wei, Ping and Dambacher, Michael and Yan, Ming and Zhou, Xiaolin},
  title     = {Experimental effects and individual differences in linear mixed models: estimating the relationship between spatial, object, and attraction effects in visual attention},
  doi       = {10.3389/fpsyg.2010.00238},
  year      = {2010},
  language  = {en}
}
@article{RomanoThielKurthsetal.2006,
  author    = {Romano, Maria Carmen and Thiel, Marco and Kurths, J{\"u}rgen and Rolfs, Martin and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Synchronization Analysis and Recurrence in Complex Systems},
  isbn      = {978-3-527-40623-4},
  year      = {2006},
  language  = {en}
}
@article{YanKlieglShuetal.2010,
  author    = {Yan, Ming and Kliegl, Reinhold and Shu, Hua and Pan, Jinger and Zhou, Xiaolin},
  title     = {Parafoveal load of word N+1 modulates preprocessing effectiveness of word N+2 in chinese reading},
  doi       = {10.1037/a0019329},
  year      = {2010},
  language  = {en}
}
@article{DittmannKohliLachmannKliegletal.1991,
  author    = {Dittmann-Kohli, Freya and Lachmann, Margic and Kliegl, Reinhold and Baltes, Paul B.},
  title     = {Effects of cognitive training and testing on intellectual efficacy beliefs in elderly adults},
  year      = {1991},
  language  = {en}
}
@article{GoetheEsserGendtetal.2012,
  author    = {G{\"o}the, Katrin and Esser, G{\"u}nter and Gendt, Anja and Kliegl, Reinhold},
  title     = {Working memory in children : tracing age differences and special educational needs to parameters of a formal model},
  year      = {2012},
  abstract  = {Parameters of a formal working-memory model were estimated for verbal and spatial memory updating of children. The model proposes interference though feature overwriting and through confusion of whole elements as the primary cause of working-memory capacity limits. We tested 2 age groups each containing 1 group of normal intelligence and 1 deficit group. For young children the deficit was developmental dyslexia; for older children it was a general learning difficulty. The interference model predicts less interference through overwriting but more through confusion of whole elements for the dyslexic children than for their age-matched controls. Older children exhibited less interference through confusion of whole elements and a higher processing rate than young children, but general learning difficulty was associated with slower processing than in the age-matched control group. Furthermore, the difference between verbal and spatial updating mapped onto several meaningful dissociations of model parameters.},
  language  = {en}
}
@article{HeisterKliegl2012,
  author    = {Heister, Julian and Kliegl, Reinhold},
  title     = {Comparing word frequencies from different German text corpora},
  isbn      = {978-3-86956-178-3},
  year      = {2012},
  language  = {en}
}
@article{RisseKliegl2011,
  author    = {Risse, Sarah and Kliegl, Reinhold},
  title     = {Adult age difference in the perceptual span during reading},
  year      = {2011},
  abstract  = {Following up on research suggesting an age-related reduction in the rightward extent of the perceptual span during reading (Rayner, Castelhano, \& Yang, 2009), we compared old and young adults in an N + 2-boundary paradigm in which a nonword preview of word N + 2 or word N + 2 itself is replaced by the target word once the eyes cross an invisible boundary located after word N. The intermediate word N + 1 was always three letters long. Gaze durations on word N + 2 were significantly shorter for identical than nonword N + 2 preview both for young and for old adults, with no significant difference in this preview benefit. Young adults, however, did modulate their gaze duration on word N more strongly than old adults in response to the difficulty of the parafoveal word N + 1. Taken together, the results suggest a dissociation of preview benefit and parafoveal-on-foveal effect. Results are discussed in terms of age-related decline in resilience towards distributed processing while simultaneously preserving the ability to integrate parafoveal information into foveal processing. As such, the present results relate to proposals of regulatory compensation strategies older adults use to secure an overall reading speed very similar to that of young adults. (PsycINFO Database Record (c) 2011 APA, all rights reserved)},
  language  = {en}
}
@article{BostonHalbeVasishthetal.2011,
  author    = {Boston, Marisa Ferrara and Halbe, John T. and Vasishth, Shravan and Kliegl, Reinhold},
  title     = {Parallel processing and entence comprehension difficulty},
  doi       = {10.1080/01690965.2010.492228},
  year      = {2011},
  abstract  = {Eye fixation durations during normal reading correlate with processing difficulty, but the specific cognitive mechanisms reflected in these measures are not well understood. This study finds support in German readers' eye fixations for two distinct difficulty metrics: surprisal, which reflects the change in probabilities across syntactic analyses as new words are integrated; and retrieval, which quantifies comprehension difficulty in terms of working memory constraints. We examine the predictions of both metrics using a family of dependency parsers indexed by an upper limit on the number of candidate syntactic analyses they retain at successive words. Surprisal models all fixation measures and regression probability. By contrast, retrieval does not model any measure in serial processing. As more candidate analyses are considered in parallel at each word, retrieval can account for the same measures as surprisal. This pattern suggests an important role for ranked parallelism in theories of sentence comprehension.},
  language  = {en}
}
@article{MoshelZivotofskyLiangetal.2008,
  author    = {Moshel, Shay and Zivotofsky, Ari Z. and Liang, Jin-Rong and Engbert, Ralf and Kurths, J{\"u}rgen and Kliegl, Reinhold and Havlin, Shlomo},
  title     = {Persistence and phase synchronization properties of fixational eye movement},
  issn      = {1951-6355},
  year      = {2008},
  abstract  = {When we fixate our gaze on a stable object, our eyes move continuously with extremely small involuntary and autonomic movements, that even we are unaware of during their occurrence. One of the roles of these fixational eye movements is to prevent the adaptation of the visual system to continuous illumination and inhibit fading of the image. These random, small movements are restricted at long time scales so as to keep the target at the centre of the field of view. In addition, the synchronisation properties between both eyes are related to binocular coordination in order to provide stereopsis. We investigated the roles of different time scale behaviours, especially how they are expressed in the different spatial directions (vertical versus horizontal). We also tested the synchronisation between both eyes. Results show different scaling behaviour between horizontal and vertical movements. When the small ballistic movements, i.e., microsaccades, are removed, the scaling behaviour in both axes becomes similar. Our findings suggest that microsaccades enhance the persistence at short time scales mostly in the horizontal component and much less in the vertical component. We also applied the phase synchronisation decay method to study the synchronisation between six combinations of binocular fixational eye movement components. We found that the vertical-vertical components of right and left eyes are significantly more synchronised than the horizontal-horizontal components. These differences may be due to the need for continuously moving the eyes in the horizontal plane in order to match the stereoscopic image for different viewing distances.},
  language  = {en}
}
@article{LaubrockEngbertKliegl2008,
  author    = {Laubrock, Jochen and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Fixational eye movements predict the perceived direction of ambiguous apparent motion},
  issn      = {1534-7362},
  doi       = {10.1167/8.14.13},
  year      = {2008},
  abstract  = {Neuronal activity in area LIP is correlated with the perceived direction of ambiguous apparent motion (Z. M. Williams, J. C. Elfar, E. N. Eskandar, L. J. Toth, \& J. A. Assad, 2003). Here we show that a similar correlation exists for small eye movements made during fixation. A moving dot grid with superimposed fixation point was presented through an aperture. In a motion discrimination task, unambiguous motion was compared with ambiguous motion obtained by shifting the grid by half of the dot distance. In three experiments we show that (a) microsaccadic inhibition, i.e., a drop in microsaccade frequency precedes reports of perceptual flips, (b) microsaccadic inhibition does not accompany simple response changes, and (c) the direction of microsaccades occurring before motion onset biases the subsequent perception of ambiguous motion. We conclude that microsaccades provide a signal on which perceptual judgments rely in the absence of objective disambiguating stimulus information.},
  language  = {en}
}
@article{ThielRomanoKurthsetal.2006,
  author    = {Thiel, Marco and Romano, Maria Carmen and Kurths, J{\"u}rgen and Rolfs, Martin and Kliegl, Reinhold},
  title     = {Twin surrogates to test for complex synchronisation},
  doi       = {10.1209/epl/i2006-10147-0},
  year      = {2006},
  abstract  = {We present an approach to generate (multivariate) twin surrogates (TS) based on recurrence properties. This technique generates surrogates which correspond to an independent copy of the underlying system, i.e. they induce a trajectory of the underlying system starting at different initial conditions. We show that these surrogates are well suited to test for complex synchronisation and exemplify this for the paradigmatic system of Rossler oscillators. The proposed test enables to assess the statistical relevance of a synchronisation analysis from passive experiments which are typical in natural systems},
  language  = {en}
}
@article{NuthmannEngbertKliegl2007,
  author    = {Nuthmann, Antje and Engbert, Ralf and Kliegl, Reinhold},
  title     = {The IOVP-effect in mindless reading : Experiment and modeling},
  doi       = {10.1016/j.visres.2006.11.005},
  year      = {2007},
  abstract  = {Fixation durations in reading are longer for within-word fixation positions close to word center than for positions near word boundaries. This counterintuitive result was termed the Inverted-Optimal Viewing Position (IOVP) effect. We proposed an explanation of the effect based on error-correction of mislocated fixations [Nuthmann, A., Engbert, R., \& Kliegl, R. (2005). Mislocated fixations during reading and the inverted optimal viewing position effect. Vision Research, 45, 2201-2217], that suggests that the IOVP effect is not related to word processing. Here we demonstrate the existence of an IOVP effect in "mindless reading", a G-string scanning task. We compare the results from experimental data with results obtained from computer simulations of a simple model of the IOVP effect and discuss alternative accounts. We conclude that oculornotor errors, which often induce mislocalized fixations, represent the most important source of the IOVP effect. (c) 2006 Elsevier Ltd. All rights reserved.},
  language  = {en}
}
@article{RolfsLaubrockKliegl2006,
  author    = {Rolfs, Martin and Laubrock, Jochen and Kliegl, Reinhold},
  title     = {Shortening and prolongation of saccade latencies following microsaccades},
  doi       = {10.1007/s00221-005-0148-1},
  year      = {2006},
  abstract  = {When the eyes fixate at a point in a visual scene, small saccades rapidly shift the image on the retina. The effect of these microsaccades on the latency of subsequent large-scale saccades may be twofold. First, microsaccades are associated with an enhancement of visual perception. Their occurrence during saccade target perception could, thus, decrease saccade latencies. Second, microsaccades are likely to indicate activity in fixation-related oculomotor neurons. These represent competitors to saccade-related cells in the interplay of gaze holding and shifting. Consequently, an increase in saccade latencies would be expected after microsaccades. Here, we present evidence for both aspects of microsaccadic impact on saccade latency. In a delayed response task, participants made saccades to visible or memorized targets. First, microsaccade occurrence up to 50 ms before target disappearance correlated with 18 ms (or 8\%) faster saccades to memorized targets. Second, if microsaccades occurred shortly (i.e., < 150 ms) before a saccade was required, mean saccadic reaction time in visual and memory trials was increased by about 40 ms (or 16\%). Hence, microsaccades can have opposite consequences for saccade latencies, pointing at a differential role of these fixational eye movements in the preparation of saccade motor programs},
  language  = {en}
}
@article{KinderRolfsKliegl2008,
  author    = {Kinder, Annette and Rolfs, Martin and Kliegl, Reinhold},
  title     = {Sequence learning at optimal stimulus-response mapping : evidence from a serial reaction-time task},
  doi       = {10.1080/17470210701557555},
  year      = {2008},
  abstract  = {We propose a new version of the serial reaction time (SRT) task in which participants merely looked at the target instead of responding manually. As response locations were identical to target locations, stimulus - response compatibility was maximal in this task. We demonstrated that saccadic response times decreased during training and increased again when a new sequence was presented. It is unlikely that this effect was caused by stimulus - response (S - R) learning because bonds between (visual) stimuli and (oculomotor) responses were already well established before the experiment started. Thus, the finding shows that the building of S - R bonds is not essential for learning in the SRT task.},
  language  = {en}
}
@article{LaubrockKlieglEngbert2006,
  author    = {Laubrock, Jochen and Kliegl, Reinhold and Engbert, Ralf},
  title     = {SWIFT explorations of age differences in eye movements during reading},
  issn      = {0149-7634},
  doi       = {10.1016/j.neubiorev.2006.06.013},
  year      = {2006},
  language  = {en}
}
@article{HohensteinKliegl2010,
  author    = {Hohenstein, Sven and Kliegl, Reinhold},
  title     = {Semantic preview benefit in eye movements during reading : a parafoveal fast-priming study},
  issn      = {0278-7393},
  doi       = {10.1037/A0020233},
  year      = {2010},
  abstract  = {Eye movements in reading are sensitive to foveal and parafoveal word features. Whereas the influence of orthographic or phonological parafoveal information on gaze control is undisputed, there has been no reliable evidence for early parafoveal extraction of semantic information in alphabetic script. Using a novel combination of the gaze- contingent fast-priming and boundary paradigms, we demonstrate semantic preview benefit when a semantically related parafoveal word was available during the initial 125 ms of a fixation on the pretarget word (Experiments 1 and 2). When the target location was made more salient, significant parafoveal semantic priming occurred only at 80 ms (Experiment 3). Finally, with short primes only (20, 40, 60 ms), effects were not significant but were numerically in the expected direction for 40 and 60 ms (Experiment 4). In all experiments, fixation durations on the target word increased with prime durations under all conditions. The evidence for extraction of semantic information from the parafoveal word favors an explanation in terms of parallel word processing in reading.},
  language  = {en}
}
@article{HoernigWeskottKliegletal.2006,
  author    = {H{\"o}rnig, Robin and Weskott, Thomas and Kliegl, Reinhold and Fanselow, Gisbert},
  title     = {Word order variation in spatial descriptions with adverbs},
  issn      = {0090-502X},
  doi       = {10.3758/BF03193264},
  year      = {2006},
  abstract  = {Previous research has shown that in a three-term spatial reasoning task, the second premise of a German premise pair is especially easy to comprehend if (1) the prepositional object rather than the grammatical subject denotes the given entity, and if (2) the term denoting the given entity precedes the term denoting the new entity. Accordingly, the second premise is easiest to comprehend with noncanonical word order-that is, with the prepositional object in preverbal position denoting the given entity (e.g., To the right of the given object is the new subject). This finding is explained in terms of contextual licensing of noncanonical word order. Here, we discuss and tested two alternative accounts of contextual licensing, given-new and partially ordered set relations (Poset). The given-new account claims that noncanonical word order is licensed by the term denoting the given entity preceding the term denoting the new entity. On the Poset account, noncanonical word order is licensed if the preverbal constituent introduces a new entity that stands in a transitive, irreflexive, and asymmetric relation to a given entity. Comprehension times for second premises with spatial adverbs in four different word orders support both accounts of contextual licensing; Poset licensing was stronger than given-new licensing.},
  language  = {en}
}
@article{DambacherKlieglHofmannetal.2006,
  author    = {Dambacher, Michael and Kliegl, Reinhold and Hofmann, Markus and Jacobs, Arthur M.},
  title     = {Frequency and predictability effects on event-related potentials during reading},
  issn      = {0006-8993},
  doi       = {10.1016/j.brainres.2006.02.010},
  year      = {2006},
  abstract  = {Effects of frequency, predictability, and position of words on event-related potentials were assessed during word-by-word sentence reading in 48 subjects in an early and in a late time window corresponding to P200 and N400. Repeated measures multiple regression analyses revealed a P200 effect in the high-frequency range also the P200 was larger on words at the beginning and end of sentences than on words in the middle of sentences (i.e., a quadratic effect of word position). Predictability strongly affected the N400 component; the effect was stronger for low than for high- frequency words. The P200 frequency effect indicates that high-frequency words are lexically accessed very fast, independent of context information. Effects on the N400 suggest that predictability strongly moderates the late access especially of low-frequency words. Thus, contextual facilitation on the N400 appears to reflect both lexical and post- lexical stages of word recognition, questioning a strict classification into lexical and post-lexical processes.},
  language  = {en}
}
@article{OberauerKliegl2006,
  author    = {Oberauer, Klaus and Kliegl, Reinhold},
  title     = {A formal model of capacity limits in working memory},
  series = {Journal of Memory and Language},
  volume    = {55},
  journal   = {Journal of Memory and Language},
  number    = {4},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0749-596X},
  doi       = {10.1016/j.jml.2006.08.009},
  pages     = {601 -- 626},
  year      = {2006},
  abstract  = {A mathematical model of working-memory capacity limits is proposed on the key assumption of mutual interference between items in working memory. Interference is assumed to arise from overwriting of features shared by these items. The model was fit to time-accuracy data of memory-updating tasks from four experiments using nonlinear mixed effect (NLME) models as a framework. The model gave a good account of the data from a numerical and a spatial task version. The performance pattern in a combination of numerical and spatial updating could be explained by variations in the interference parameter: assuming less feature overlap between contents from different domains than between contents from the same domain, the model can account for double dissociations of content domains in dual-task experiments. Experiment 3 extended this idea to similarity within the verbal domain. The decline of memory accuracy with increasing memory load was steeper with phonologically similar than with dissimilar material, although processing speed was faster for the similar material. The model captured the similarity effects with a higher estimated interference parameter for the similar than for the dissimilar condition. The results are difficult to explain with alternative models, in particular models incorporating time-based decay and models assuming limited resource pools.},
  language  = {en}
}
@article{KlieglRisseLaubrock2007,
  author    = {Kliegl, Reinhold and Risse, Sarah and Laubrock, Jochen},
  title     = {Preview benefit and parafoveal-on-foveal effects from word n+2},
  issn      = {0096-1523},
  doi       = {10.1037/0096-1523.33.5.1250},
  year      = {2007},
  abstract  = {Using the gaze-contingent boundary paradigm with the boundary placed after word n, the experiment manipulated preview of word n + 2 for fixations on word n. There was no preview benefit for 1st-pass reading on word n + 2, replicating the results of K. Rayner, B. J. Juhasz, and S. J. Brown (2007), but there was a preview benefit on the 3- letter word n + 1, that is, after the boundary but before word n + 2. Additionally, both word n + 1 and word n + 2 exhibited parafoveal-on-foveal effects on word n. Thus, during a fixation on word n and given a short word n + 1, some information is extracted from word n + 2, supporting the hypothesis of distributed processing in the perceptual span.},
  language  = {en}
}
@article{ValsecchiDimigenKliegletal.2009,
  author    = {Valsecchi, Matteo and Dimigen, Olaf and Kliegl, Reinhold and Sommer, Werner and Turatto, Massimo},
  title     = {Microsaccadic inhibition and P300 enhancement in a visual oddball task},
  issn      = {0048-5772},
  doi       = {10.1111/j.1469-8986.2009.00791.x},
  year      = {2009},
  abstract  = {It has recently been demonstrated that the presentation of visual oddballs induces a prolonged inhibition of microsaccades. The amplitude of the P300 component in event-related potentials (ERPs) has been shown to be sensitive to the category (target vs. nontarget) of the eliciting stimulus, its overall probability, and the preceding stimulus sequence. In the present study we further specify the functional underpinnings of the prolonged microsaccadic inhibition in the visual oddball task, showing that the stimulus category, the frequency of a stimulus, and the preceding stimulus sequence influence microsaccade rate. Furthermore, by co-recording ERPs and eye movements, we were able to demonstrate that, despite being largely sensitive to the same experimental manipulation, the amplitude of P300 and the microsaccadic inhibition predict each other only weakly.},
  language  = {en}
}
@article{LaubrockKlieglRolfsetal.2010,
  author    = {Laubrock, Jochen and Kliegl, Reinhold and Rolfs, Martin and Engbert, Ralf},
  title     = {When do microsaccades follow spatial attention?},
  issn      = {1943-3921},
  doi       = {10.3758/APP.72.3.683},
  year      = {2010},
  abstract  = {Following up on an exchange about the relation between microsaccades and spatial attention (Horowitz, Fencsik, Fine, Yurgenson, \& Wolfe, 2007; Horowitz, Fine, Fencsik, Yurgenson, \& Wolfe, 2007; Laubrock, Engbert, Rolfs, \& Kliegl, 2007), we examine the effects of selection criteria and response modality. We show that for Posner cuing with saccadic responses, microsaccades go with attention in at least 75\% of cases (almost 90\% if probability matching is assumed) when they are first (or only) microsaccades in the cue target interval and when they occur between 200 and 400 msec after the cue. The relation between spatial attention and the direction of microsaccades drops to chance level for unselected microsaccades collected during manual-response conditions. Analyses of data from four cross-modal cuing experiments demonstrate an above-chance, intermediate link for visual cues, but no systematic relation for auditory cues. Thus, the link between spatial attention and direction of microsaccades depends on the experimental condition and time of occurrence, but it can be very strong.},
  language  = {en}
}
@article{DimigenValsecchieSommeretal.2009,
  author    = {Dimigen, Olaf and Valsecchie, Matteo and Sommer, Werner and Kliegl, Reinhold},
  title     = {Human microsaccade-related visual brain responses},
  issn      = {0270-6474},
  doi       = {10.1523/JNEUROSCI.0911-09.2009},
  year      = {2009},
  language  = {en}
}
@article{RisseEngbertKliegl2008,
  author    = {Risse, Sarah and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Eye-movement control in reading : experimental and corpus-analysis challenges for a computational model},
  isbn      = {978-7-201-06107-8},
  year      = {2008},
  language  = {en}
}
@article{OngKliegl2008,
  author    = {Ong, James Kwan Yau and Kliegl, Reinhold},
  title     = {Conditional co-occurrence probability acts like frequency in predicting fixation durations},
  issn      = {1995-8692},
  year      = {2008},
  language  = {en}
}
@article{FeryKaiserHoernigetal.2009,
  author    = {F{\´e}ry, Caroline and Kaiser, Elsi and H{\"o}rnig, Robin and Weskott, Thomas and Kliegl, Reinhold},
  title     = {Perception of intonational contours on given and new referents : a completion study and an eye-movement experiment},
  isbn      = {978-3-11-021922-7},
  year      = {2009},
  language  = {en}
}
@article{RolfsLaubrockKliegl2008,
  author    = {Rolfs, Martin and Laubrock, Jochen and Kliegl, Reinhold},
  title     = {Microsaccade-induced prolongation of saccadic latencies depends on microsaccade amplitude},
  issn      = {1995-8692},
  year      = {2008},
  language  = {en}
}
@article{NuthmannKliegl2009,
  author    = {Nuthmann, Antje and Kliegl, Reinhold},
  title     = {Preferred viewing locations : a validation},
  issn      = {0301-0066},
  year      = {2009},
  language  = {en}
}
@article{BaptistaBohnKliegletal.2008,
  author    = {Baptista, Murilo da Silva and Bohn, Christiane and Kliegl, Reinhold and Engbert, Ralf and Kurths, J{\"u}rgen},
  title     = {Reconstruction of eye movements during blinks},
  issn      = {1054-1500},
  doi       = {10.1063/1.2890843},
  year      = {2008},
  language  = {en}
}
@article{YanRichterShuetal.2009,
  author    = {Yan, Ming and Richter, Eike M. and Shu, Hua and Kliegl, Reinhold},
  title     = {Readers of Chinese extract semantic information from parafoveal words},
  issn      = {1069-9384},
  doi       = {10.3758/Pbr.16.3.561},
  year      = {2009},
  abstract  = {Evidence for semantic preview benefit (PB) from parafoveal words has been elusive for reading alphabetic scripts such as English. Here we report semantic PB for noncompound characters in Chinese reading with the boundary paradigm. In addition, PBs for orthographic relatedness and, as a numeric trend, for phonological relatedness were obtained. Results are in agreement with other research suggesting that the Chinese writing system is based on a closer association between graphic form and meaning than is alphabetic script. We discuss implications for notions of serial attention shifts and parallel distributed processing of words during reading.},
  language  = {en}
}